[BUGFIX] Revert Set controller in ExtbasePluginEnhancer"

The accepted change adds an ugly side-effect when using
the same controller/action in multiple route variants.

This reverts commit 977ed578.

Resolves: #87668
Reverts: #87337
Releases: master, 9.5

Change-Id: I7167b42cb26538e676256c9d2e36d1ec18f2bd40
Reviewed-on: https://review.typo3.org/59658


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