codesniffer: Stop suppressing Commenting.WrongStyle in Jetpack-Tests

[anomiex]

Proposed changes:

Phan depends on doc comments using /** openers. While we often don't bother with doc comments in tests, where we do have them we should format them correctly.

The existing cases mostly fell into a few categories:

• Actual doc comments.
• "Section" separators being confused for function comments. Converted these to a /** ... **/ style to make the sniff happy with them.
• Useless comments about how to use phpunit --filter. Removed these.
• Useless comments basically repeating the test function name. Removed these too.

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

None. But see #37122 where chasing missing WrongStyle sniffs led to another fix.

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

No

Testing instructions:

• CI happy?

[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/codesniffer-Jetpack-Tests-WrongStyle branch.

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

  bin/jetpack-downloader test jetpack fix/codesniffer-Jetpack-Tests-WrongStyle
  

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[github-actions]

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