Add wsgiref.types (Python 3.11+) (#7644)

_typeshed.wsgi: Import from wsgiref.types in Python 3.11+

Make types match wsgiref.types

stdlib/wsgiref/util.pyi

@@ -1,8 +1,7 @@
 import sys
+from _typeshed.wsgi import WSGIEnvironment
 from typing import IO, Any, Callable
 
-from .types import WSGIEnvironment
-
 __all__ = ["FileWrapper", "guess_scheme", "application_uri", "request_uri", "shift_path_info", "setup_testing_defaults"]
 
 class FileWrapper: