Revert file field changes

[talldan]

Proposed changes:

Proposes reverting #41582 and #41586

From what I can see these PRs result in the file field block being available in production, while the PR implies they should be experimental/beta.

The main impact of this is that if a user has added this block, they'll see a message "Your site doesn't include support for the "jetpack/field-file" block" after this. The block won't appear in the frontend, but everything else (the editor, other blocks) works without issue

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)?

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

No

Testing instructions:

1. Open the editor
2. Try adding the 'File Upload Field' block, it shouldn't be possible

[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 revert/file-field-changes branch.

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

  bin/jetpack-downloader test jetpack revert/file-field-changes
  

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• 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]

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[github-actions]

Code Coverage Summary

Coverage changed in 4 files.

File	Coverage	Δ%	Δ Uncovered
projects/packages/forms/src/blocks/contact-form/components/jetpack-field.js	0/17 (0.00%)	0.00%	-1 💚
projects/packages/forms/src/contact-form/class-contact-form-plugin.php	111/828 (13.41%)	0.03%	-2 💚
projects/packages/forms/src/blocks/contact-form/util/register-jetpack-block.js	0/13 (0.00%)	0.00%	-4 💚
projects/packages/forms/src/blocks/contact-form/class-contact-form-block.php	0/141 (0.00%)	0.00%	-9 💚

Full summary · PHP report · JS report

[talldan]

From what I can see these PRs result in the file field block being available in production, while the PR implies they should be experimental/beta.

@ramonjd discovered that this is a false alarm, I had something set in my environment that made the beta blocks available!