[TASK] Improve updates of metadata in MetaDataRepository

If you run the FAL update wizard for tt_content images the
MetaDataRepository requests database fields for each update separately.
This information should be stored in an internal array to avoid
unnecessary database requests and increase performance.

Resolves: #53709
Releases: 6.2
Change-Id: Icbef451f9a02395d758626254be004e87f350039
Reviewed-on: https://review.typo3.org/25470
Reviewed-by: Markus Klein
Tested-by: Markus Klein
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters