Google Fonts: mark feature as Beta and remove from dashboard.

[jeherve]

Follow-up from #23295

Changes proposed in this Pull Request:

• The feature is still under development, and we'll need to make some more changes before it's ready for prime-time. Let's make that clear in the plugin by marking the module as beta and removing the toggle from the dashboard to avoid setting wrong expectations.

Jetpack product discussion

• Internal reference: p1HpG7-flD-p2#comment-53417

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

• No

Testing instructions:

• Go to Jetpack > Settings > Writing, and scroll down to the Theme Enhancements section; you should not see a section about Google Fonts.
• Go to Jetpack > Modules (from the link at the bottom of the dashboard page). You should see the Google Fonts module, but with a Beta label.

[github-actions]

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Jetpack plugin:

• Next scheduled release: April 5, 2022.
• Scheduled code freeze: March 29, 2022.

[samiff]

Looks good 👍

• Toggle removed on Dashboard.
• Was able to control the setting from jetpack_modules page.
• Google Fonts still applied from Global styles as expected.

[samiff]

cherry-picked to jetpack/branch-10.8 in 92df9b4