[php-src] Issue #9504: serialization fatal error and deprecation

Issue: https://github.com/php/php-src/issues/9504 Author: staabm ### Description The following code: ```php <?php <?php // lint >= 8.1 namespace MissingMagicSerializationMethods; use Serializable; enum myEnum implements Serializable { case X; case Y; public function serialize() { } public function unserialize($data) { } } ``` Resulted in this output: ``` Deprecated: MissingMagicSerializationMethods\myEnum implements the Serializable interface, which is deprecated. Implement __serialize() and __unserialize() instead (or in addition, if support for old PHP versions is necessary) in /in/tKdD6 on line 8 Fatal error: Enum MissingMagicSerializationMethods\myEnum cannot implement the Serializable interface in /in/tKdD6 on line 8 ``` But I expected this output instead: - no deprecation message, as its already a fatal error https://3v4l.org/tKdD6 ### PHP Version 8.1+ ### Operating System _No response_