[BUGFIX] Followup to #54226

The fix for issue #54226 introduced a bug
with FileReferences as it did not implement the
change of the interface.

Resolves: #54226
Releases: 6.2
Change-Id: I9f67f3f23b96569cdfadba1505e4881103a86ccb
Reviewed-on: https://review.typo3.org/27170
Reviewed-by: Benjamin Mack
Tested-by: Benjamin Mack