[Gutenberg][Testing] Gallery to inner blocks

[dratwas]

Fixes #

To test:

PR submission checklist:

• I have considered adding unit tests where possible.
• I have considered adding accessibility improvements for my changes.
• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary.

[peril-wordpress-mobile]

	Fails
🚫	Podfile: reference to a commit hash

	Warnings
⚠️	PR is missing at least one label.

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[peril-wordpress-mobile]

You can test the changes on this Pull Request by downloading it from AppCenter here with build number: 38042. IPA is available here. If you need access to this, you can ask a maintainer to add you.

[peril-wordpress-mobile]

You can trigger optional UI/connected tests for these changes by visiting CircleCI here.

[mkevins]

Closing, since the main PR is already merged. Thanks for all your work on this @dratwas 👍

Mobile PR: WordPress/gutenberg#31306