[typing] Mark some NamedTuple methods as @final (#15895)

Author: DetachHead

stdlib/typing.pyi

@@ -1060,9 +1060,12 @@ class NamedTuple(tuple[Any, ...]):
     @deprecated("Creating a typing.NamedTuple using keyword arguments is deprecated and support will be removed in Python 3.15")
     def __init__(self, typename: str, fields: None = None, /, **kwargs: Any) -> None: ...
 
+    @final
     @classmethod
     def _make(cls, iterable: Iterable[Any]) -> typing_extensions.Self: ...
+    @final
     def _asdict(self) -> dict[str, Any]: ...
+    @final
     def _replace(self, **kwargs: Any) -> typing_extensions.Self: ...
     if sys.version_info >= (3, 13):
         def __replace__(self, **kwargs: Any) -> typing_extensions.Self: ...