[PHP 8.4] Change `PHP_DEBUG` constant usage to `ZEND_DEBUG_BUILD` #8403

Job	Run time
Code Style checks	1m 16s
PHP 8.1 / PHPStan analysis	1m 18s
PHP 8.1 / Generated Code consistency checks	19s
PHP 8.1 / PHPUnit tests	9s
PHP 8.1 / Integration tests	14s
PHP 8.2 / Generated Code consistency checks	12s
PHP 8.2 / Integration tests	15s
PHP 8.2 / PHPStan analysis	1m 19s
PHP 8.2 / PHPUnit tests	8s
PHP 8.3 / Generated Code consistency checks	18s
PHP 8.3 / Integration tests	18s
PHP 8.3 / PHPStan analysis	1m 21s
PHP 8.3 / PHPUnit tests	12s
	7m 19s

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