Add datetime __replace__ methods on 3.13+ (#12014)

stdlib/@tests/stubtest_allowlists/py313.txt

@@ -178,11 +178,8 @@ ctypes.sizeof
 ctypes.wintypes.PCHAR.from_param
 ctypes.wintypes.PWCHAR.from_param
 dataclasses.Field.__class_getitem__
-datetime.date.__replace__
 datetime.date.fromisoformat
-datetime.datetime.__replace__
 datetime.datetime.fromisoformat
-datetime.time.__replace__
 datetime.time.fromisoformat
 datetime.timezone.dst
 datetime.timezone.fromutc