[Gutenberg] Enable file block

[etoledom]

This PR enables the File Block on the gutenberg block editor.

To test:

• Install the CI build on your device.
• Follow the manual tests document: TBD

PR submission checklist:

• I have considered adding unit tests where possible.
• I have considered adding accessibility improvements for my changes.
• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary.

[peril-wordpress-mobile]

You can trigger an installable build for these changes by visiting CircleCI here.

[peril-wordpress-mobile]

You can trigger optional UI/connected tests for these changes by visiting CircleCI here.

[etoledom]

✅ TC001: Upload completes successfully from the device library.
✅ TC002: Upload completes successfully from the WordPress Media library.
✅ TC003: Upload fails from the device library.
✅ TC004: Stop the file upload before it completes.
✅ TC005: Close the post with an ongoing file upload.
✅ TC006: Replace the selected files.
✅ TC007: Change the alignment in the File Block.
✅ TC009: Open link in new tab.
✅ TC0010: Show/hide download button.
✅ TC0011: Copy file URL.
✅ TC0012: (Not yet on the document) Close and reopen post with an ongoing file upload.

[jkmassel]

👋 Hey there! We are freezing 16.3 today, so this PR is being bumped to 16.4. If you need it to be part of the 16.3 release, please merge it to the release/16.3 branch and send me a DM – I'll be happy to cut a new beta release!

[etoledom]

Updated with the following changes:
WordPress/gutenberg#27228 (comment)

[jd-alexander]

@etoledom could you update the gb mobile submodule to the latest changes here. I appreciate the help.
WordPress/gutenberg#27228 (comment)
I would, but I am not sure how to generate the bundle. I think I saw the command recently but I haven't used it as yet.

[etoledom]

✅ Tested again with the new build and everything looks shinny ✨

[jd-alexander]

@etoledom I ran thorough tests using all the latest changes and all the test cases worked as expected.

• ✅ TC001: Upload completes successfully from the device library.
• ✅ TC002: Insert completes successfully from the WordPress Media library.
• ✅ TC003: Upload fails from the device library.
• ✅ TC004: Stop the file upload before it completes.
• ✅ TC005: Close the post with an ongoing file upload.
• ✅ TC006: Replace the selected files.
• ✅ TC007: Change the alignment in the File Block.
• ✅ TC009: Open link in new tab.
• ✅ TC0010: Show/hide download button.
• ✅ TC0011: Copy file URL.
• ✅ TC0012: Close and reopen post with an ongoing file upload.