[BUGFIX] Enable deletion of translated sys_file_metadata records

UserTS disableDelete was set for sys_file_metadata globally
and therefore also prevented the deletion of translated file metadata.
By preventing deletion of sys_file_metadata records only for default
language records, the user can remove translated ones again at will.

Resolves: #83066
Relates: #71678
Releases: master, 8.7
Change-Id: I3b83a3dd63b02b94bdd34dd8f002436af14ad45d
Reviewed-on: https://review.typo3.org/55340


Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>