[php-src] PR #24184: fix: system ID for Apache graceful restart

Pull Request: https://github.com/php/php-src/pull/24184 Author: morrisonlevi Apache forks workers from a parent process. During a graceful restart, PHP shuts down and starts up again in that same parent process. However, finalized was not reset to 0 during subsequent startups, so all calls to zend_add_system_entropy() would fail. This could cause the process state to diverge from the system ID used to validate OPcache's file cache. For example, zend_get_resource_handle() would still allocate a handle, but its entropy would not contribute to the system ID. Enabling, disabling, or reordering extensions or features across graceful restarts could therefore change resource-slot assignments without a corresponding change to the system ID. Reset finalized when initializing the system ID so each startup can register fresh entropy. ---- I think this fix should definitely go into PHP 8.4+ but I think that RMs should consider pulling it for 8.2-8.3. It is not a dangerous change, it's simple, and easy to understand (well, assuming you already understand Apache graceful and system ID), and causes really nasty bugs when it's hit.