[FEATURE] Media module should respect user's file mounts

Change-Id: I344765bccd4c315c8ff0ea4d9f2d4294c7bd208c
Resolves: #56745
Releases: 3.0
Reviewed-on: https://review.typo3.org/30231
Reviewed-by: Fabien Udriot
Tested-by: Fabien Udriot