asyncio: updates for 3.11 (#7844)

CPython changes:

- https://github.com/python/cpython/commit/13c10bfb777483c7b02877aab029345a056b809c
- https://github.com/python/cpython/commit/9523c0d84f351a610dc651b234461eb015fa3b82
- https://github.com/python/cpython/commit/9f04ee569cebb8b4c6f04bea95d91a19c5403806
- https://github.com/python/cpython/commit/d03acd7270d66ddb8e987f9743405147ecc15087
- https://github.com/python/cpython/commit/195a46d6ffd4cec6c5fb69c5890f8b1758ac91ca

Co-authored-by: Shantanu <12621235+hauntsaninja@users.noreply.github.com>
Co-authored-by: Alex Waygood <Alex.Waygood@Gmail.com>

stdlib/asyncio/mixins.pyi

@@ -1,7 +1,9 @@
+import sys
 import threading
 from typing import NoReturn
 
 _global_lock: threading.Lock
 
 class _LoopBoundMixin:
-    def __init__(self, *, loop: NoReturn = ...) -> None: ...
+    if sys.version_info < (3, 11):
+        def __init__(self, *, loop: NoReturn = ...) -> None: ...