[TASK] Add some basic tests for the FAL stuff

Change-Id: Ic16b8d90e4163aaff1bc0bfe6fce8479264f4044
Reviewed-on: https://review.typo3.org/27036
Reviewed-by: Georg Ringer
Tested-by: Georg Ringer
[TASK] Raise limit for relatedFiles, relatedLinks

Change it from 10 to 100

Change-Id: I106d08d2c5fdaf3952c66140c14184bced0ca1af
Resolves: #55285
Reviewed-on: https://review.typo3.org/27037
Reviewed-by: Georg Ringer
Tested-by: Georg Ringer