[BUGFIX] TCA: sys_file_reference:title exclude = 1

Make the title field of sys_file_reference excludable so
it can be hidden in the BE.

Resolves: #49501
Releases: 6.2
Change-Id: Ifad9213e9d46a41287d2d907aec77b6c2ae8a6be
Reviewed-on: https://review.typo3.org/24444
Reviewed-by: Chris topher
Tested-by: Chris topher
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters