[php-src] PR #25407: Fix GH-25388: Stale ext/date tz cache after logging during startup

Pull Request: https://github.com/php/php-src/pull/25407 Author: lazerg When an error is logged during module startup, php_format_date() fills DATEG(tzcache) with startup memory. That memory is freed before the first request, but the pointer stays set, so a log written at request startup before RINIT (here the missing output_handler) reads the freed table. On the other hand, a cache built at request startup leaked, because RINIT reset the pointer to NULL. The cache is now skipped while the executor is not active, and RINIT no longer clears it, since post-deactivate already frees it and sets it back to NULL. Fixes #25388