Remove unnecessary ast eval bailout

[iluuu1994]

We can just reset the filename_override to NULL in php_request_shutdown.

This was only added to PHP-8.2. So I hope it's fine to remove it at this point.

[TysonAndre]

We can just reset the filename_override to NULL in php_request_shutdown.

This was only added to PHP-8.2. So I hope it's fine to remove it at this point.

This seems like the cleanest fix

• I can't envision anything inside or outside of php depending on those constants being null - they're only for use by php's ast parser and tokenizer
• This also avoids any similar fuzzing ASSERT failures in the future
• the zend_try/zend_catch/zend_bailout apis seem to be catching the bailout (setjmp/longjmp) and rethrowing a bailout

(I started looking at this PR because I'm one of the leads of https://pecl.php.net/package/ast which uses the internal ast APIs meant for external use)