bpo-39481: PEP 585 for a variety of modules (GH-19423)

- concurrent.futures
- ctypes
- http.cookies
- multiprocessing
- queue
- tempfile
- unittest.case
- urllib.parse

Lib/tempfile.py

@@ -829,3 +829,5 @@ class TemporaryDirectory(object):
     def cleanup(self):
         if self._finalizer.detach():
             self._rmtree(self.name)
+
+    __class_getitem__ = classmethod(_types.GenericAlias)