Add support for viewing trashed posts

[kean]

Fixes #6037 by allowing you to preview trashed posts and restore them right from the editor. This is now a much better experience than the production version where you tap on a trashed post and nothing happens. On Android, tapping on a trashed prompt, opens an alert to restore it. This is taking it a step further.

Testing

Test 1.1

Note: test for Posts, Pages and Search

• Open a trashed post
• ✅ Verify that navigation bar buttons are hidden
• Tap anywhere in the UI or perform any other gesture like swip
• ✅ Verify that the alert promting you to restore the post is shown
• Tap "Restore"
• ✅ Verify that the success notice was shown
• ✅ Verify that the UI was reloaded and the navigation bar buttons appeared (matching "draft" state)
• (Optional) Make and save changes to the post
• ✅ Verify that the changes were saved

Test 1.2

• Open a trashed post
• Close the trashed post
• Open the trashed post
• ✅ Verify that no assertions were hit and nothing updated in the UI

Screen.Recording.2024-05-02.at.11.55.11.AM.mov

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.

Testing checklist:

• WordPress.com sites and self-hosted Jetpack sites.
• Portrait and landscape orientations.
• Light and dark modes.
• Fonts: Larger, smaller and bold text.
• High contrast.
• VoiceOver.
• Languages with large words or with letters/accents not frequently used in English.
• Right-to-left languages. (Even if translation isn’t complete, formatting should still respect the right-to-left layout)
• iPhone and iPad.
• Multi-tasking: Split view and Slide over. (iPad)

[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	pr23142-d9fdb34
	Version	24.8
	Bundle ID	org.wordpress.alpha
	Commit	d9fdb34
	App Center Build	WPiOS - One-Offs #9795

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 Jetpack Alpha by scanning the QR code below to install the corresponding build.

	App Name	Jetpack Alpha
	Configuration	Release-Alpha
	Build Number	pr23142-d9fdb34
	Version	24.8
	Bundle ID	com.jetpack.alpha
	Commit	d9fdb34
	App Center Build	jetpack-installable-builds #8841

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

[momo-ozawa]

LGTM with a few nits

[momo-ozawa]

[nit] rename to TrashedPostOverlayView.swift to match class name

[kean]

👍 I renamed the class itself to PostTrashedOverlayView – using Post as a namescape.