[php-src] Issue #8024: No deprecation warning is triggered for nullable optional parameters before required ones

Issue: https://github.com/php/php-src/issues/8024 Author: m-vo ### Description The following code: ```php <?php function foo(int $param_optional = null, int $param_required) {} ``` Resulted in this output: ``` (no deprecation warning triggered) ``` But I expected this output instead: ``` Deprecated: Optional parameter $param_optional declared before required parameter $param_required is implicitly treated as a required parameter in […]``` ``` It seems having a nullable parameter will prevent the deprecation from being triggered. See https://3v4l.org/biVG1#v8.1.2 for a comparison. ### PHP Version >=PHP8.0 ### Operating System _No response_