[typing] Add NewType.__name__ attribute (#15092)

Author: guoci

stdlib/typing.pyi

@@ -387,6 +387,7 @@ if sys.version_info >= (3, 10):
         def __or__(self, other: Any) -> _SpecialForm: ...
         def __ror__(self, other: Any) -> _SpecialForm: ...
         __supertype__: type | NewType
+        __name__: str
 
 else:
     def NewType(name: str, tp: Any) -> Any: ...

stdlib/typing_extensions.pyi

@@ -376,6 +376,7 @@ else:
         def __init__(self, name: str, tp: AnnotationForm) -> None: ...
         def __call__(self, obj: _T, /) -> _T: ...
         __supertype__: type | NewType
+        __name__: str
         if sys.version_info >= (3, 10):
             def __or__(self, other: Any) -> _SpecialForm: ...
             def __ror__(self, other: Any) -> _SpecialForm: ...