[BUGFIX] TCA title of table sys_file_metadata is "File"

Table sys_file_metadata shares the same title as table sys_file
which makes it impossible to distinguish when granting access
in a be_groups record.

Fixes: #56890
Releases: 6.2
Change-Id: Ibce38f0f878e34c06a0d66c550fe7bf62cc33700
Reviewed-on: https://review.typo3.org/28361
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters
Reviewed-by: Xavier Perseguers
Tested-by: Xavier Perseguers