[0.80][Fabric] Fix UIA Clipped Property for Modal Component

[vineethkuttan]

Description

Fixing UIA Clipping property for Modal Component.
Cherry-pick cc9d7a0

Type of Change

Bug fix

Why

Will fix the UIA clipping state of Modal Component.
Resolves [microsoft/react-native-gallery/issues/650]

Screenshots

Changelog

Should this change be included in the release notes: yes

UIA Clipping property for Modal Component is fixed.

Microsoft Reviewers: Open in CodeFlow

[protikbiswas100]

LGTM

[sundaramramaswamy]

Please drop template strings from PR description given for your guidance but not to pollute commit messages.

## Description
Fixing UIA Clipping property for Modal Component.
Cherry-pick from cc9d7a0

### Type of Change
_Erase all that don't apply._
- Bug fix (non-breaking change which fixes an issue)

### Why
Will fix the UIA clipping state of Modal Component.

Resolves [microsoft/react-native-gallery/issues/650]

### What
Clipped

## Screenshots
<img width="1570" height="1208" alt="image" src="https://github.com/user-attachments/assets/a5f5dd97-b2ee-44e7-ab6e-f05d69074e69" />

## Testing
If you added tests that prove your changes are effective or that your feature works, add a few sentences here detailing the added test scenarios.

_Optional_: Describe the tests that you ran locally to verify your changes.

## Changelog
Should this change be included in the release notes: _yes_

UIA Clipping property for Modal Component is fixed.

 ###### Microsoft Reviewers: [Open in CodeFlow](https://microsoft.github.io/open-pr/?codeflow=https://github.com/microsoft/react-native-windows/pull/15184)

should be

# Description
Fixing UIA Clipping property for Modal Component.
Cherry-pick cc9d7a0

## Type of Change
Bug fix

## Why
Will fix the UIA clipping state of Modal Component.
Resolves [microsoft/react-native-gallery/issues/650]

# Screenshots
<img width="1570" height="1208" alt="image" src="https://github.com/user-attachments/assets/a5f5dd97-b2ee-44e7-ab6e-f05d69074e69" />

# Changelog
Should this change be included in the release notes: _yes_

UIA Clipping property for Modal Component is fixed.

Which of these would you rather read? Why do we add string which don't make sense to a commit at all? Sections like Testing, Erase all that don't apply (this clearly says not to add itself and other unneeded sections and even that is left out without deletion).

These template strings are just noise. Compare these messages with PRs from mature developers and notice the difference:

#14713 by Andrew
#15013 by Jon

[sundaramramaswamy]

Title should be a short summary in imperative mood (Fix, not Fixing or Fixed).

A good commit message

• Captures the why (context) not how / what (which git diff can always show)
• Is succinct.

Please refer How to Write a Git Commit Message.

[sundaramramaswamy]

Please fix aforementioned comments.

[sundaramramaswamy]

LGTM

[sundaramramaswamy]

Nice, thanks, it's very readable now :)