[BUGFIX] Cast values always to string before applying through ini_set

Resolves: #83826
Releases: master
Change-Id: I55d7141ffb26126215be029547e143ed2f777707
Reviewed-on: https://review.typo3.org/55629


Reviewed-by: Christian Kuhn <lolli@schwarzbu.ch>
Tested-by: Christian Kuhn <lolli@schwarzbu.ch>
Reviewed-by: Mathias Schreiber <mathias.schreiber@typo3.com>
Tested-by: Mathias Schreiber <mathias.schreiber@typo3.com>
Reviewed-by: Oliver Klee <typo3-coding@oliverklee.de>
Tested-by: TYPO3com <no-reply@typo3.com>