VideoPress: check if beta extension is enabled when saving VideoPress video block

[retrofox]

This PR checks if the beta extension of the "Preview On Hover" feature is enabled when the block saves. If it isn't, the function will return the same makeup generated when the feature is disabled. Otherwise, it will return the new one.

Fixes #

Proposed changes:

• VideoPress: check if beta extension is enabled when saving VideoPress video block

Other information:

• Have you written new tests for your changes, if applicable?

Jetpack product discussion

Does this pull request change what data or activity we track or use?

Testing instructions:

• Test with an old post with a VideoPress video instance. In case you don't have, you can:
  • Create a JN site
  • Connect the site. Enable the VideoPress module
  • Do not enable beta extension
  • Create a Post
  • Add a VideoPress video block
  • Save the post
• Test with Jetpack Beta plugin
• Switch Jetpack plugin with this branch update/videopress-check-beta-extensions-when-saving
• Go to the testing post
• Hard-refresh
• Confirm the block doesn't have validation issues
• Enable beta exensions
• Confirm the block doesn't have validation issues
• Confirm the PreviewOnHover feature is there (block sidebar)

[github-actions]

Thank you for your PR!

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[github-actions]

Are you an Automattician? You can now test your Pull Request on WordPress.com. On your sandbox, run

bin/jetpack-downloader test jetpack update/videopress-check-beta-extensions-when-saving

to get started. More details: p9dueE-5Nn-p2

[dhasilva]

LGTM