[BUGFIX] Ignore translations from other workspaces

Ignore translations of content elements (tt_content) which are created in
other workspace, so it is able to create a new/other translation in
another workspace even inside the live workspace

Change-Id: Ifef673b8677ae81f238068ed3a0bfdd1ca8e7932
Resolves: #81691
Releases: master, 8.7
Reviewed-on: https://review.typo3.org/53330


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Susanne Moog <susanne.moog@typo3.org>
Tested-by: Susanne Moog <susanne.moog@typo3.org>
Reviewed-by: Mathias Schreiber <mathias.schreiber@typo3.com>
Tested-by: Mathias Schreiber <mathias.schreiber@typo3.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>