RET501 should exempt properties

[epenet]

A property is normally meant to be consumed.

class Class:
    @property
    def data(self) -> None:
        return None
        # RET501 [*] Do not explicitly `return None` in function if it is the only possible return value

Based on home-assistant/core#115031

Note: the main case is when overriding base properties, so this may not be needed if #12198 is resolved.

[AlexWaygood]

Yeah, I agree you'd probably want to explicitly return None in a property. PR welcome!