Fix connection test API path for WoA sites to fix broken connection notices not showing up

[manzoorwanijk]

Currently, the broken connection notices are not shown on WoA sites because the connection test result uses the wrong endpoint which returns the data in an incorrect format.

Proposed changes:

• Update the endpoint used for connection test results

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

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

Testing instructions:

• Using Jetpack Beta Tester plugin, activate this branch on your WoA site
• Add at least one social connection like Facebook or Mastodon
• Edit a post in Block Editor
• Open Jetpack sidebar
• Select at least one connection and click on "Share post"
• Confirm that the post is shared successfully
• Now break the connection by removing "Jetpack" from Facebook or Mastodon
• Goto the editor again
• Now verify that that you see the notice about the broken connection

[github-actions]

Are you an Automattician? Please test your changes on all WordPress.com environments to help mitigate accidental explosions.

• To test on WoA, go to the Plugins menu on a WordPress.com Simple site. Click on the "Upload" button and follow the upgrade flow to be able to upload, install, and activate the Jetpack Beta plugin. Once the plugin is active, go to Jetpack > Jetpack Beta, select your plugin, and enable the fix/connection-tests-for-woa branch.

• To test on Simple, run the following command on your sandbox:

  bin/jetpack-downloader test jetpack fix/connection-tests-for-woa
  

Interested in more tips and information?

• In your local development environment, use the jetpack rsync command to sync your changes to a WoA dev blog.
• Read more about our development workflow here: PCYsg-eg0-p2
• Figure out when your changes will be shipped to customers here: PCYsg-eg5-p2

[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:

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• ✅ 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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[manzoorwanijk]

I have tested it thoroughly and it works fine.