[TASK] Change labelfunc for media for 6.2

Since #51411 it is possible to use a different hook
for the label.
change label_userFunc to formattedLabel_userFunc

Change-Id: I2087abfee4bac77330488a203a27aed785e33d8c
Resolves: #52209
Reviewed-on: https://review.typo3.org/24915
Reviewed-by: Georg Ringer
Tested-by: Georg Ringer