[BUGFIX] Make file processing configuration serializable

This allows to use the mask property from the TypoScript
imgResource function again.

Resolves: #96116
Releases: main, 11.5
Change-Id: Ia069a687e98a91437959e1bbd4efc5d59fb2017c
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/72395


Tested-by: core-ci <typo3@b13.com>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Nikita Hovratov <nikita.h@live.de>
Reviewed-by: Nikita Hovratov <nikita.h@live.de>