Use Folders for WordPressTest

[jkmassel]

Similar to #23743 and #23736, this PR removes a bunch more stuff from the project file in favour of using the File System for organization.

To Test:

• Ensure CI passes

Blocked by #23743 – will have to be rebased after that PR lands

[dangermattic]

	3 Warnings
⚠️	Translation files *.lproj/Localizable.strings should only be updated on a release branch.
⚠️	View files have been modified, but no screenshot or video is included in the pull request. Consider adding some for clarity.
⚠️	This PR is larger than 500 lines of changes. Please consider splitting it into smaller PRs for easier and faster reviews.

	1 Message
📖	This PR is still a Draft: some checks will be skipped.

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[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	pr23745-312134b
	Version	25.4.2
	Bundle ID	org.wordpress.alpha
	Commit	312134b
	App Center Build	WPiOS - One-Offs #10947

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[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	pr23745-312134b
	Version	25.4.2
	Bundle ID	com.jetpack.alpha
	Commit	312134b
	App Center Build	jetpack-installable-builds #9987

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