Repo Gardening: handle auto-labeling for more Publicize locations

[jeherve]

Proposed changes:

The Publicize feature now lives in a package, a Jetpack module, and a js package. We should support that.

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?
• Have you tested your changes on WordPress.com, if applicable (if so, you'll see a generated comment below with a script to run)?

Jetpack product discussion

N/A

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

No

Testing instructions:

This can be tested in a fork, by merging this branch to trunk, and then opening a PR making a change to projects/js-packages/publicize-components/index.ts or projects/packages/publicize/src/class-publicize-script-data.php for example.

[github-actions]

Thank you for your PR!

When contributing to Jetpack, we have a few suggestions that can help us test and review your patch:

• ✅ Include a description of your PR changes.
  
• ✅ Add a "[Status]" label (In Progress, Needs Team Review, ...).
  
• ✅ Add testing instructions.
  
• ✅ Specify whether this PR includes any changes to data or privacy.
  
• ✅ Add changelog entries to affected projects
  

This comment will be updated as you work on your PR and make changes. If you think that some of those checks are not needed for your PR, please explain why you think so. Thanks for cooperation 🤖

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Follow this PR Review Process:

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[anomiex]

Looks reasonable. Haven't tested.