Deprecate few fonts

[simison]

See p9Jlb4-5Dj-p2 for design discussion.

Related to #27441

Changes proposed in this Pull Request:

• Removes fonts:
  • Domine
  • Montserrat
  • Raleway
  • Open Sans
  • Poppins
• The fonts are still registered and functional if already used, but won't appear at Global styles font dropdown going forward.

Other information:

• Have you written new tests for your changes, if applicable?
• Have you checked the E2E test CI results, and verified that your changes do not break them?

Jetpack product discussion

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

Testing instructions:

• Go to '..'

[github-actions]

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Jetpack plugin:

• Next scheduled release: January 3, 2023.
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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/fonts-deprecated to get started. More details: p9dueE-5Nn-p2