[TASK] Create new processor registry

File processing might be different for external storages.
Therefore it must be possible to register your own File Processors
and make the registry driver aware.

Resolves: #56775
Releases: 6.2
Change-Id: I187f6f987f7b0bc92989ed38cbef248449a7f59f
Reviewed-on: https://review.typo3.org/27958
Reviewed-by: Steffen Ritter
Tested-by: Steffen Ritter