OPcache - handle opcache.restrict_api setting

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When opcache parameter restrict_api is set there is a warning when OPCache is cleared. Reading: Testing 6.5.4, reading over a few internet articles and https://www.php.net/manual/en/opcache.configuration.php#ini.opcache.restrict-api I see that it also blocks the request.

Fix: if restrict_api is not set or empty, reset cache will work. If path from restrict_api is found in script that starts the reset, it will work. Eg: opcache.restrict_api="/home/ssssss.com/public_html"

Tickets: https://wordpress.org/support/topic/zend-opcache-api-is-restricted-by-restrict_api-5/ #9496550