[BUGFIX] Return class alias respecting namespace

The resolveControllerAliasFromControllerClassName returns an alias
respecting subfolders in controller namespace to avoid same aliases
for different controllers and to load the templates from
corresponding directories.

Resolves: #90480
Releases: master
Change-Id: I3ed691e126579a4cfcc35f9589beb017b06a2f82
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63361


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Susanne Moog <look@susi.dev>
Tested-by: Alexander Schnitzler <git@alexanderschnitzler.de>
Reviewed-by: Susanne Moog <look@susi.dev>
Reviewed-by: Alexander Schnitzler <git@alexanderschnitzler.de>