[php-src] Issue #8176: Using enum objects in property initializers leaks

Issue: https://github.com/php/php-src/issues/8176 Author: bwoebi ### Description ```php <?php enum AnEnum { case Value; } class AClass { public $prop = AnEnum::Value; } var_dump(new AClass); ``` leaks the AnEnum::Value enum object. The reason is that the enum object gets stored in the property table of AClass, but objects are freed before property tables are destroyed: - zend_objects_store_free_object_storage does an addref, as the object is not released yet - destroy_zend_class reduces refcount when freeing default properties, but too late, it's (obviously) called after object storage freeing. ### PHP Version master ### Operating System _No response_