add types.MethodType.__get__ on py313+ (#14190)

Author: jorenham

stdlib/types.pyi

@@ -482,6 +482,10 @@ class MethodType:
     def __qualname__(self) -> str: ...  # inherited from the added function
     def __new__(cls, func: Callable[..., Any], instance: object, /) -> Self: ...
     def __call__(self, *args: Any, **kwargs: Any) -> Any: ...
+
+    if sys.version_info >= (3, 13):
+        def __get__(self, instance: object, owner: type | None = None, /) -> Self: ...
+
     def __eq__(self, value: object, /) -> bool: ...
     def __hash__(self) -> int: ...