Revert "Cleanup zend execution/error callback overwrites."
Revert "Cleanup zend execution/error callback overwrites."

This reverts commit 10be1c93ee974503bfdc7e3c0eae6e3d172e918f.

lisa2lisa/php-profiler-extension,krakjoe/php-profiler-extension,lisa2lisa/php-profiler-extension,stof/php-profiler-extension,QafooLabs/php-profiler-extension,tideways/php-profiler-extension,tideways/php-profiler-extension,stof/php-profiler-extension,krakjoe/php-profiler-extension,QafooLabs/php-profiler-extension