Use Any for ConnectionProxy attributes (#2311)

Whilst the type is generic, it is not a wrapper - `__getattr__` should not return the inner type.

Author: RealOrangeOne

django-stubs/utils/connection.pyi

@@ -7,8 +7,8 @@ _T = TypeVar("_T")
 
 class ConnectionProxy(Generic[_T]):
     def __init__(self, connections: BaseConnectionHandler[_T], alias: str) -> None: ...
-    def __getattr__(self, item: str) -> _T: ...
-    def __setattr__(self, name: str, value: _T) -> None: ...
+    def __getattr__(self, item: str) -> Any: ...
+    def __setattr__(self, name: str, value: Any) -> None: ...
     def __delattr__(self, name: str) -> None: ...
     def __contains__(self, key: str) -> bool: ...
     def __eq__(self, other: object) -> bool: ...