Revert "Merge branch 'PHP-8.3'"

This reverts commit a2313cea5a7bc2770363d5b3409242241b33833a, reversing
changes made to 588029a989401e0f32445174e8bf6242205ed2a7.

zend_max_execution_timer: fix gcc compatibility (#15447)

Revert "Merge branch 'PHP-8.3'"

This reverts commit b363a606a4ae8a7ca86f9338b5bffe4376716ed9, reversing
changes made to 3ed5eee5d3ae03c992fc66c502b73eba9c392edf.

zend_max_execution_timer: fix gcc compatibility (#15447)

Fix MSan false-positive in zend_max_execution_timer (#15408)

Explicitly mark memory regions as unpoisoned for zend_max_execution_timer on ZTS, as MemorySanitizer in clang >= 18 causes false

Fix MSan false-positive in zend_max_execution_timer (#15408)

Explicitly mark memory regions as unpoisoned for zend_max_execution_timer on ZTS, as MemorySanitizer in clang >= 18 causes false positives.

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fix: zend-max-execution-timers with negative or high timeout value (#13942)

Align the behavior of zend-max-execution-timers with other timeout impls: Negative or very high timeout values are

fix: zend-max-execution-timers with negative or high timeout value (#13942)

Align the behavior of zend-max-execution-timers with other timeout impls: Negative or very high timeout values are equivalent to no timeout

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Remove redundant getpid function call (#13454)

add support for Zend Max Exeuction Timers on FreeBSD (#13393)

Fix timer leak (#13027)

ts_resource() and php_request_startup() both eventually call zend_max_execution_timer_init(), which didn't have a guard to prevent recreating timers, thus resulting i

Fix timer leak (#13027)

ts_resource() and php_request_startup() both eventually call zend_max_execution_timer_init(), which didn't have a guard to prevent recreating timers, thus resulting in leaking timers. This adds a guard to prevent the leak.

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fix: don't delete an unitialized timer (#12537)

fix: support for timeouts with ZTS on Linux (#10141)