[BUGFIX] Add check if opcache_invalidate exists

The existing condition checks if opcache_invalidate
and opcache_reset are disabled, the new condition
also checks if the function opcache_invalidate exists.

Resolves: #97826
Releases: main, 11.5
Change-Id: Ibb201946b358a592f3c5b264646d100867e5e385
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/75135


Tested-by: core-ci <typo3@b13.com>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>