Fix base class compatibility for IntFlag in Python 3.11+ to resolve inverted type issue (#13854)

Author: vidhyavijayan3

stdlib/enum.pyi

@@ -299,6 +299,7 @@ if sys.version_info >= (3, 11):
         def __or__(self, other: int) -> Self: ...
         def __and__(self, other: int) -> Self: ...
         def __xor__(self, other: int) -> Self: ...
+        def __invert__(self) -> Self: ...
         __ror__ = __or__
         __rand__ = __and__
         __rxor__ = __xor__
@@ -309,6 +310,7 @@ else:
         def __or__(self, other: int) -> Self: ...
         def __and__(self, other: int) -> Self: ...
         def __xor__(self, other: int) -> Self: ...
+        def __invert__(self) -> Self: ...
         __ror__ = __or__
         __rand__ = __and__
         __rxor__ = __xor__