waitress: stubtest-complete and update usage of Any (#11796)

stubs/waitress/@tests/stubtest_allowlist.txt

@@ -1,33 +1,4 @@
-waitress.adjustments.Adjustments.clear_untrusted_proxy_headers
-waitress.adjustments.PY2
-waitress.adjustments.string_types
-waitress.channel.HTTPChannel.addr
-waitress.channel.HTTPChannel.error_task_class
-waitress.channel.HTTPChannel.parser_class
-waitress.channel.HTTPChannel.request
-waitress.channel.HTTPChannel.task_class
-waitress.compat.PY2
-waitress.compat.PY3
-waitress.compat.ResourceWarning
-waitress.compat.class_types
-waitress.compat.exec_
-waitress.compat.integer_types
-waitress.compat.qualname
-waitress.compat.reraise
-waitress.compat.set_nonblocking
-waitress.compat.string_types
-waitress.compat.text_
-waitress.compat.tobytes
-waitress.compat.tostr
-waitress.compat.unquote_bytes_to_wsgi
-waitress.rfc7230.tobytes
-waitress.server.BaseWSGIServer.channel_class
-waitress.server.BaseWSGIServer.get_server_name
-waitress.server.MultiSocketServer.__init__
-waitress.server.WSGIServer
-waitress.task.ErrorTask.content_length
-waitress.task.ThreadedTaskDispatcher.start_new_thread
-waitress.task.WSGITask.content_length
-waitress.rfc7230.BWS
-waitress.wasyncore.map
-waitress.wasyncore.dispatcher_with_send.handle_write
+waitress.__main__
+
+# Leaked loop variable
+waitress.utilities.i

stubs/waitress/@tests/stubtest_allowlist_darwin.txt

@@ -1 +0,0 @@
-waitress.server.UnixWSGIServer.get_server_name

stubs/waitress/@tests/stubtest_allowlist_linux.txt

@@ -1 +0,0 @@
-waitress.server.UnixWSGIServer.get_server_name