My Jetpack: fix Stats Learn More link when site is disconnected

[IanRamosC]

See related issue for more context

Proposed changes:

• This PR fixes the Learn More link specifically for Stats when the user has never been connected. It sends the user to the product interstitial instead of sending to a broken screen.

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:

• Spin up a JN site with Jetpack Beta pointing to this branch
• Visit My Jetpack
• Scroll down to the Stats section and click on "Learn more" without connecting to Jetpack

* Confirm that you are redirected to `/wp-admin/admin.php?page=my-jetpack#/add-stats`

[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/learn-more-url-for-disconnected-stats branch.

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

  bin/jetpack-downloader test jetpack fix/learn-more-url-for-disconnected-stats
  

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!

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[CodeyGuyDylan]

This breaks a couple cards that are also have the needs_first_site_connection status. For example, when I click on the Akismet "Learn More" CTA, I am now taken to the Stats interstitial. Same for Creator and AI

incorrect-interstitial.mov

[IanRamosC]

This breaks a couple cards that are also have the needs_first_site_connection status. For example, when I click on the Akismet "Learn More" CTA, I am now taken to the Stats interstitial. Same for Creator and AI

You're right, it was not the right code lol

[CodeyGuyDylan]

Tests well, thanks for the fix!