- Updates the README to indicate that iOS 12 and 13 are no longer supported.
- Updates the minimum version of the iOS implementation package to one with privacy manifest support. See related discussion in #6355

Original pr #6540

Related to flutter/flutter#141627

1. Update GoogleSignIn iOS SDK dependency to [7.1](https://github.com/google/GoogleSignIn-iOS/releases/tag/7.1.0), which supports privacy manifests.
1. Update "fetch deps step" to run `pod repo update` every time to avoid missing spec failure. Also added a fetch deps step to the all_packages builds, since those could also use a `pod repo update` but I didn't want to add more logic to those bash scripts.
```
     [!] CocoaPods could not find compatible versions for pod "GoogleSignIn":
       In Podfile:
         google_sign_in_ios (from `Flutter/ephemeral/.symlinks/plugins/google_sign_in_ios/darwin`) was resolved to 0.0.1, which depends on
           GoogleSignIn (~> 7.1)
     None of your spec sources contain a spec satisfying the dependency: `GoogleSignIn (~> 7.1)`.
```
https://logs.chromium.org/logs/flutter/buildbucket/cr-buildbucket/8752192509749702705/+/u/Run_package_tests/download_Dart_and_iOS_deps/stdout

3. Looks like the new versions of [`GTMSessionFetcher`](https://github.com/CocoaPods/Specs/blob/master/Specs/c/e/3/GTMSessionFetcher/3.3.2/GTMSessionFetcher.podspec.json) and [`AppAuth`](https://github.com/CocoaPods/Specs/blob/master/Specs/b/b/9/AppAuth/1.7.3/AppAuth.podspec.json) don't define modules, so there's an error building it statically:
```
     [!] The following Swift pods cannot yet be integrated as static libraries:
     The Swift pod `GTMAppAuth` depends upon `GTMSessionFetcher` and `AppAuth`, which do not define modules. To opt into those targets generating module maps (which is necessary to import them from Swift when building as static libraries), you may set `use_modular_headers!` globally in your Podfile, or specify `:modular_headers => true` for particular dependencies.
```
I filed google/gtm-session-fetcher#384 and openid/AppAuth-iOS#844.

In the meantime, I updated the example apps to `use_frameworks!`, which would be on for Flutter Swift apps, but not Objective-C ones.  We could add something to the tool to detect this case, and suggest `use_frameworks!` be added?  

4.  Even though google_sign_in_ios does not contain Swift files, for some reason, there is a "pod lib lint" warning complaining `swift_version` isn't set. This seems related to `GTMAppAuth` dependency constraint that went from an Objective-C-only to Swift pod.  So I set `swift_version` since it's harmless.

```
- WARN  | swift: The validator used Swift `4.0` by default because no Swift version was specified. To specify a Swift version during validation, add the `swift_versions` attribute in your podspec. Note that usage of a `.swift-version` file is now deprecated.
```
https://logs.chromium.org/logs/flutter/buildbucket/cr-buildbucket/8752100979634945505/+/u/Run_package_tests/validate_iOS_and_macOS_podspecs/stdout

## Issues

* Fixes flutter/flutter#145777
* Fixes flutter/flutter#145866
* See also flutter/flutter#137140

…kit (#6556)

Part of flutter/flutter/issues/141627
reviewed pr #6540

Converts one platform channel method to Pigeon, setting up all the Pigeon plumbing and test scaffolding.

The Camera API surface is relatively large, so this lays a foundation for incremental conversion, minimizing the mixing of Pigeon setup with the individual method conversions.

Part of flutter/flutter#117905

- **Add changelog and version bump**
- **dependency override from package tool**

Fixes flutter/flutter/issues/141627

This relocates most of `table_span.dart` to `../common/span.dart`, renaming the classes to basic Spans instead of TableSpans.
This is because since a Span can represent a row or a column, the new base Span class will be used to build TreeRows in the upcoming TreeView.
In `table_span.dart`, the old classes are now typedefs. This is because (IMO) the Table and Tree APIs are better to work with when the naming conventions reflect what you are building. The Table and Tree uses of Span could also deviate in the future and it felt prudent to leave room for future changes that may be specific to only one or the other.

Otherwise a bit of tidying to get ready for TreeView!

Part of flutter/flutter#42332

We're in the process of adding Linux desktop support to Pigeon (#5100), so we need the Linux desktop dependencies in the relevant tasks.

Bumps [github/codeql-action](https://github.com/github/codeql-action) from 3.25.0 to 3.25.1.
<details>
<summary>Changelog</summary>
<p><em>Sourced from <a href="https://github.com/github/codeql-action/blob/main/CHANGELOG.md">github/codeql-action's changelog</a>.</em></p>
<blockquote>
<h1>CodeQL Action Changelog</h1>
<p>See the <a href="https://github.com/github/codeql-action/releases">releases page</a> for the relevant changes to the CodeQL CLI and language packs.</p>
<p>Note that the only difference between <code>v2</code> and <code>v3</code> of the CodeQL Action is the node version they support, with <code>v3</code> running on node 20 while we continue to release <code>v2</code> to support running on node 16. For example <code>3.22.11</code> was the first <code>v3</code> release and is functionally identical to <code>2.22.11</code>. This approach ensures an easy way to track exactly which features are included in different versions, indicated by the minor and patch version numbers.</p>
<h2>[UNRELEASED]</h2>
<p>No user facing changes.</p>
<h2>3.25.1 - 17 Apr 2024</h2>
<ul>
<li>We are rolling out a feature in April/May 2024 that improves the reliability and performance of analyzing code when analyzing a compiled language with the <code>autobuild</code> <a href="https://docs.github.com/en/code-security/code-scanning/creating-an-advanced-setup-for-code-scanning/codeql-code-scanning-for-compiled-languages#codeql-build-modes">build mode</a>. <a href="https://github.com/github/codeql-action/pull/2235">#2235</a></li>
<li>Fix a bug where the <code>init</code> Action would fail if <code>--overwrite</code> was specified in <code>CODEQL_ACTION_EXTRA_OPTIONS</code>. <a href="https://github.com/github/codeql-action/pull/2245">#2245</a></li>
</ul>
<h2>3.25.0 - 15 Apr 2024</h2>
<ul>
<li>
<p>The deprecated feature for extracting dependencies for a Python analysis has been removed. <a href="https://github.com/github/codeql-action/pull/2224">#2224</a></p>
<p>As a result, the following inputs and environment variables are now ignored:</p>
<ul>
<li>The <code>setup-python-dependencies</code> input to the <code>init</code> Action</li>
<li>The <code>CODEQL_ACTION_DISABLE_PYTHON_DEPENDENCY_INSTALLATION</code> environment variable</li>
</ul>
<p>We recommend removing any references to these from your workflows. For more information, see the release notes for CodeQL Action v3.23.0 and v2.23.0.</p>
</li>
<li>
<p>Automatically overwrite an existing database if found on the filesystem. <a href="https://github.com/github/codeql-action/pull/2229">#2229</a></p>
</li>
<li>
<p>Bump the minimum CodeQL bundle version to 2.12.6. <a href="https://github.com/github/codeql-action/pull/2232">#2232</a></p>
</li>
<li>
<p>A more relevant log message and a diagnostic are now emitted when the <code>file</code> program is not installed on a Linux runner, but is required for Go tracing to succeed. <a href="https://github.com/github/codeql-action/pull/2234">#2234</a></p>
</li>
</ul>
<h2>3.24.10 - 05 Apr 2024</h2>
<ul>
<li>Update default CodeQL bundle version to 2.17.0. <a href="https://github.com/github/codeql-action/pull/2219">#2219</a></li>
<li>Add a deprecation warning for customers using CodeQL version 2.12.5 and earlier. These versions of CodeQL were discontinued on 26 March 2024 alongside GitHub Enterprise Server 3.8, and will be unsupported by CodeQL Action versions 3.25.0 and later and versions 2.25.0 and later. <a href="https://github.com/github/codeql-action/pull/2220">#2220</a>
<ul>
<li>If you are using one of these versions, please update to CodeQL CLI version 2.12.6 or later. For instance, if you have specified a custom version of the CLI using the 'tools' input to the 'init' Action, you can remove this input to use the default version.</li>
<li>Alternatively, if you want to continue using a version of the CodeQL CLI between 2.11.6 and 2.12.5, you can replace <code>github/codeql-action/*@V3</code> by <code>github/codeql-action/*@v3.24.10</code> and <code>github/codeql-action/*@v2</code> by <code>github/codeql-action/*@v2.24.10</code> in your code scanning workflow to ensure you continue using this version of the CodeQL Action.</li>
</ul>
</li>
</ul>
<h2>3.24.9 - 22 Mar 2024</h2>
<ul>
<li>Update default CodeQL bundle version to 2.16.5. <a href="https://github.com/github/codeql-action/pull/2203">#2203</a></li>
</ul>
<h2>3.24.8 - 18 Mar 2024</h2>
<ul>
<li>Improve the ease of debugging extraction issues by increasing the verbosity of the extractor logs when running in debug mode. <a href="https://github.com/github/codeql-action/pull/2195">#2195</a></li>
</ul>
<h2>3.24.7 - 12 Mar 2024</h2>
<ul>
<li>Update default CodeQL bundle version to 2.16.4. <a href="https://github.com/github/codeql-action/pull/2185">#2185</a></li>
</ul>
<h2>3.24.6 - 29 Feb 2024</h2>
</blockquote>
<p>... (truncated)</p>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/github/codeql-action/commit/c7f9125735019aa87cfc361530512d50ea439c71"><code>c7f9125</code></a> Merge pull request <a href="https://github.com/github/codeql-action/issues/2248">#2248</a> from github/update-v3.25.1-c4fb45143</li>
<li><a href="https://github.com/github/codeql-action/commit/1c7e8b2cf27fe2842c9131549befe9126c581615"><code>1c7e8b2</code></a> Update changelog for v3.25.1</li>
<li><a href="https://github.com/github/codeql-action/commit/c4fb451437765abf5018c6fbf22cce1a7da1e5cc"><code>c4fb451</code></a> Merge pull request <a href="https://github.com/github/codeql-action/issues/2245">#2245</a> from github/henrymercer/ignore-already-specified-flags</li>
<li><a href="https://github.com/github/codeql-action/commit/556b3bcfae6e80d5b97e3022fdc26e2e2fb8fcc1"><code>556b3bc</code></a> Add changelog note</li>
<li><a href="https://github.com/github/codeql-action/commit/ef66aeacbffbc0a38d99ff4c7128b7a08402998d"><code>ef66aea</code></a> Merge branch 'main' into henrymercer/ignore-already-specified-flags</li>
<li><a href="https://github.com/github/codeql-action/commit/9b87e0a8c4c056fe190dbe9b27705e4a609b3ed7"><code>9b87e0a</code></a> Merge pull request <a href="https://github.com/github/codeql-action/issues/2241">#2241</a> from github/nickfyson/speculative-script-fix</li>
<li><a href="https://github.com/github/codeql-action/commit/18111b696bb9dfa258eafa803d7ebe62fd0c2f2a"><code>18111b6</code></a> Merge pull request <a href="https://github.com/github/codeql-action/issues/2235">#2235</a> from github/henrymercer/autobuild-with-direct-tracing</li>
<li><a href="https://github.com/github/codeql-action/commit/ade98b980a98b96bdf2a6987025f40e215961ddc"><code>ade98b9</code></a> Ensure <code>--overwrite</code> flag is only passed once</li>
<li><a href="https://github.com/github/codeql-action/commit/8566d50a791ab204d59de6606ac0714547892d92"><code>8566d50</code></a> Add regression test for double <code>--overwrite</code></li>
<li><a href="https://github.com/github/codeql-action/commit/453a95695a4bcef90d0a08e0573386c6591819db"><code>453a956</code></a> Merge pull request <a href="https://github.com/github/codeql-action/issues/2243">#2243</a> from github/dependabot/npm_and_yarn/npm-9b31496ffc</li>
<li>Additional commits viewable in <a href="https://github.com/github/codeql-action/compare/df5a14dc28094dc936e103b37d749c6628682b60...c7f9125735019aa87cfc361530512d50ea439c71">compare view</a></li>
</ul>
</details>
<br />

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