[TASK] Update EnvironmentStatus OpcodeCache info

The original implementation was meant to handle different variants of
opcaches. As of now, only the native PHP opcache is still supported.

This patch cleans up the settings and setup check and adds an
additional check whether clearing is possible or deactivated via
disable_functions.

Resolves: #90838
Releases: master
Change-Id: I12bde7cf160be548904737acee5c1d39faadeba0
Reviewed-on: https://review.typo3.org/c/Packages/TYPO3.CMS/+/63932


Tested-by: TYPO3com <noreply@typo3.com>
Tested-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Tested-by: Benni Mack <benni@typo3.org>
Reviewed-by: Andreas Fernandez <a.fernandez@scripting-base.de>
Reviewed-by: Benni Mack <benni@typo3.org>