asyncio: updates for 3.11 (#7844)

CPython changes:

- 13c10bfb77
- 9523c0d84f
- 9f04ee569c
- d03acd7270
- 195a46d6ff

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

stdlib/asyncio/taskgroups.pyi

@@ -2,6 +2,7 @@
 
 from _typeshed import Self
 from collections.abc import Coroutine, Generator
+from contextvars import Context
 from types import TracebackType
 from typing import Any, TypeVar
 
@@ -15,4 +16,6 @@ class TaskGroup:
     def __init__(self) -> None: ...
     async def __aenter__(self: Self) -> Self: ...
     async def __aexit__(self, et: type[BaseException] | None, exc: BaseException | None, tb: TracebackType | None) -> None: ...
-    def create_task(self, coro: Generator[Any, None, _T] | Coroutine[Any, Any, _T], *, name: str | None = ...) -> Task[_T]: ...
+    def create_task(
+        self, coro: Generator[Any, None, _T] | Coroutine[Any, Any, _T], *, name: str | None = ..., context: Context | None = ...
+    ) -> Task[_T]: ...