[BUGFIX] Use requested php version for testing also in web container

Resolves: #92744
Related: #92335
Releases: master, 10.4
Change-Id: Id003abf300f63096cd521d4a050254736dc919d0
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/66364


Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Anja Leichsenring <aleichsenring@ab-softlab.de>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Anja Leichsenring <aleichsenring@ab-softlab.de>