[BUGFIX] Make single errors from FileSizeValidator translatable

[BUGFIX] Make single errors from FileSizeValidator translatable

Hand over the original error code from the validator instead of
setting a new one.

Resolves: #87042
Releases: master, 9.5
Change-Id: Ifbb023423934832fdea2550aa7d3a55507616e73
Reviewed-on: https://review.typo3.org/58996
Tested-by: TYPO3com <noreply@typo3.com>
Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>