Fix 'object.__reduce__' (#6662)

Reverts regressions introduced by #6292. Fixes #6661.

Author: AlexWaygood

stdlib/builtins.pyi

@@ -106,11 +106,13 @@ class object:
     def __getattribute__(self, __name: str) -> Any: ...
     def __delattr__(self, __name: str) -> None: ...
     def __sizeof__(self) -> int: ...
-    def __reduce__(self) -> str | Tuple[object, ...]: ...
+    # return type of pickle methods is rather hard to express in the current type system
+    # see #6661 and https://docs.python.org/3/library/pickle.html#object.__reduce__
+    def __reduce__(self) -> str | Tuple[Any, ...]: ...
     if sys.version_info >= (3, 8):
-        def __reduce_ex__(self, __protocol: SupportsIndex) -> str | Tuple[object, ...]: ...
+        def __reduce_ex__(self, __protocol: SupportsIndex) -> str | Tuple[Any, ...]: ...
     else:
-        def __reduce_ex__(self, __protocol: int) -> str | Tuple[object, ...]: ...
+        def __reduce_ex__(self, __protocol: int) -> str | Tuple[Any, ...]: ...
     def __dir__(self) -> Iterable[str]: ...
     def __init_subclass__(cls) -> None: ...