[Gutenberg] Disable Story block

[fluiddot]

Related PRs:

• [RNMobile] Remove mediaFilesCollectionBlock initial prop WordPress/gutenberg#58140
• Remove Story block gutenberg-mobile#6568
• [RNMobile] Disable Story block Automattic/jetpack#35202
• [Gutenberg] Disable Story block WordPress-Android#20005

Internal ref: pcdRpT-4Vq-p2

This PR aims to disable the story block.

To test

Story block can't be inserted

1. Create a post.
2. Tap on ➕ button.
3. Scroll the block list and observe that the Story block is not displayed.
4. Tpa on the Paragraph block.
5. Type /story and observe that the Story block option is not displayed.

Story block is displayed as unsupported

1. In the browser, create a post and insert a Story block.
2. Go to the app and open the same post.
3. Observe that the Story block is displayed as unsupported.
4. Tap on the block and observe that it can still be edited via UBE (Unsupported Block Editor).

Regression Notes

1. Potential unintended areas of impact
   None.

2. What I did to test those areas of impact (or what existing automated tests I relied on)
   Tested manually the editor.

3. What automated tests I added (or what prevented me from doing so)
   N/A

PR submission checklist:

• I have completed the Regression Notes.
• I have considered adding unit tests for my changes.
• 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.

UI Changes testing checklist:

• Portrait and landscape orientations.
• Light and dark modes.
• Fonts: Larger, smaller and bold text.
• High contrast.
• VoiceOver.
• Languages with large words or with letters/accents not frequently used in English.
• Right-to-left languages. (Even if translation isn’t complete, formatting should still respect the right-to-left layout)
• iPhone and iPad.
• Multi-tasking: Split view and Slide over. (iPad)

[wpmobilebot]

📲 You can test the changes from this Pull Request in WordPress Alpha by scanning the QR code below to install the corresponding build.

	App Name	WordPress Alpha
	Configuration	Release-Alpha
	Build Number	pr22449-cfafeb9
	Version	24.1
	Bundle ID	org.wordpress.alpha
	Commit	cfafeb9
	App Center Build	WPiOS - One-Offs #8564

Automatticians: You can use our internal self-serve MC tool to give yourself access to App Center if needed.

[wpmobilebot]

📲 You can test the changes from this Pull Request in Jetpack Alpha by scanning the QR code below to install the corresponding build.

	App Name	Jetpack Alpha
	Configuration	Release-Alpha
	Build Number	pr22449-cfafeb9
	Version	24.1
	Bundle ID	com.jetpack.alpha
	Commit	cfafeb9
	App Center Build	jetpack-installable-builds #7591

Automatticians: You can use our internal self-serve MC tool to give yourself access to App Center if needed.

[dcalhoun]

Approved via wordpress-mobile/gutenberg-mobile#6568 (review).

Should add a release note in this PR or manage that elsewhere?

[fluiddot]

Should add a release note in this PR or manage that elsewhere?

Since this change will be incorporated into the beta version 24.1. I'll do that in the release PR.