[BUGFIX] Correct invalid complex query in Doctrine for fetching workspaces

Change-Id: I447274bc29d1a32745224b6cf5c2e2f76c7dfc2f
Resolves: #81947
Releases: master, 8.7
Reviewed-on: https://review.typo3.org/53577


Reviewed-by: Wouter Wolters <typo3@wouterwolters.nl>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Oliver Hader <oliver.hader@typo3.org>
Tested-by: Oliver Hader <oliver.hader@typo3.org>