Regression protected-access not recognized

[cdce8p]

class Light:
    @property
    def _light_internal(self) -> set[str]:
        return set()


def func(light: Light) -> None:
    print(light._light_internal)  # should emit 'protected-access' error

Error in pylint 2.12.2, not recognized in 2.13.0

W0212: Access to a protected member _light_internal of a client class (protected-access)

The issue is caused by a change in #5662. In particular the one in _is_mandatory_method_param which prevents the protected-access check from running.
https://github.com/PyCQA/pylint/blob/556304eb1e54c67940d0f9d0497ffa368b50a22a/pylint/checkers/classes/class_checker.py#L2105-L2122

https://github.com/PyCQA/pylint/blob/556304eb1e54c67940d0f9d0497ffa368b50a22a/pylint/checkers/classes/class_checker.py#L1470-L1476

/CC: @jacobtylerwalls