[php-src] PR #25128: Fix opcache phar check

Pull Request: https://github.com/php/php-src/pull/25128 Author: ndossche This is the cause of the flaky nightly failures on PPC for issue0149.phpt. On slow machines, enough time passes that request 2/3 are served from opcache rather than from the disk. If we set opcache.file_update_protection=0, then the failure reproduces predictably. The root cause is that the phar check in opcache only checks if the filename ends in .phar whereas ext/phar checks whether .phar is anywhere in the filename. This difference causes requests from the cache to not execute the stub, and therefore not execute the Phar::mount() call in the test, and therefore fail the expectation.