Drop iOS 14 Support: Update UTType usages (#2)

[kean]

Related Issue #20860

Removes deprecated UTType APIs. Previous related PRs that update UTType API usages: #20887, #20866, #20889.

To test:

Most of the changes are covered by the new unit tests, but there were a couple of scenarios I tested manually, just to make sure:

GIF Badges

• Open a Post / Post Settings / Set Featured Image
• Verify that GIFs have badges

Filters Types

• Open a Post
• Add an Image block
• Select “Other Apps”
• Verify that is allows you to select only images
• Repeat for other formats: video, audio

Regression Notes

1. Potential unintended areas of impact: Media-related features
2. What I did to test those areas of impact (or what existing automated tests I relied on): manual tests and unit tests
3. What automated tests I added (or what prevented me from doing so): yes

PR submission checklist:

• I have completed the Regression Notes.
• I have considered adding unit tests for my changes.
• 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.

[wpmobilebot]

📲 You can test the changes from this Pull Request in Jetpack Alpha by scanning the QR code below to install the corresponding build.

	App Name	Jetpack Alpha
	Configuration	Release-Alpha
	Build Number	pr20898-2a53c18
	Version	22.6
	Bundle ID	com.jetpack.alpha
	Commit	2a53c18
	App Center Build	jetpack-installable-builds #5066

Automatticians: You can use our internal self-serve MC tool to give yourself access to App Center if needed.

[wpmobilebot]

📲 You can test the changes from this Pull Request in WordPress Alpha by scanning the QR code below to install the corresponding build.

	App Name	WordPress Alpha
	Configuration	Release-Alpha
	Build Number	pr20898-2a53c18
	Version	22.6
	Bundle ID	org.wordpress.alpha
	Commit	2a53c18
	App Center Build	WPiOS - One-Offs #6040

Automatticians: You can use our internal self-serve MC tool to give yourself access to App Center if needed.

[momo-ozawa]

LGTM!