[TASK] Provide test for Page\TreeController

Add test for TreeController, so we're safe when refactoring
or doing performance optimizations.

Besides that moved pages in a workspace were not considered when
calculating permissions on the rootline due to missing workspace
overlays.

Resolves: #90831
Releases: 9.5, master
Change-Id: Ic3ab08d2502e8c9a3f08e737552c2e1d2a56a66c
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63848


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Oliver Hader <oliver.hader@typo3.org>
Reviewed-by: Oliver Hader <oliver.hader@typo3.org>