[BUGFIX] Failng Import/Export functional tests

As a follow-up to issue #57046 (which fixed a bug in
sys_file_metadata pointing to sys_file_reference as
translation parent), these corrections need to be
updated in the functional test assertions as well.

Resolves: #57054
Releases: 6.2
Change-Id: I1a3d395fb4fcb1271d2684af38e5fc32a10463fc
Reviewed-on: https://review.typo3.org/28512
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters
Reviewed-by: Oliver Hader
Tested-by: Oliver Hader