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/exceptions.pyi

@@ -1,11 +1,24 @@
-__all__ = (
-    "CancelledError",
-    "InvalidStateError",
-    "TimeoutError",
-    "IncompleteReadError",
-    "LimitOverrunError",
-    "SendfileNotAvailableError",
-)
+import sys
+
+if sys.version_info >= (3, 11):
+    __all__ = (
+        "BrokenBarrierError",
+        "CancelledError",
+        "InvalidStateError",
+        "TimeoutError",
+        "IncompleteReadError",
+        "LimitOverrunError",
+        "SendfileNotAvailableError",
+    )
+else:
+    __all__ = (
+        "CancelledError",
+        "InvalidStateError",
+        "TimeoutError",
+        "IncompleteReadError",
+        "LimitOverrunError",
+        "SendfileNotAvailableError",
+    )
 
 class CancelledError(BaseException): ...
 class TimeoutError(Exception): ...
@@ -20,3 +33,6 @@ class IncompleteReadError(EOFError):
 class LimitOverrunError(Exception):
     consumed: int
     def __init__(self, message: str, consumed: int) -> None: ...
+
+if sys.version_info >= (3, 11):
+    class BrokenBarrierError(RuntimeError): ...