Cherry-pick "Run trial tests against Python 3.11 (#13812)" and fixup commit

4f5d492cd6a9438de03d1b768f4c220cb662ac06

The release branch CI is failing because poetry seems unable to install
wrapt 1.13.3 when run under CPython 3.11. Develop has already bumped
wrapt for 3.11 compatibility. Cherry-pick that commit here to try and
get CI going again.

tests/federation/transport/test_client.py

@@ -15,6 +15,8 @@
 import json
 from unittest.mock import Mock
 
+import ijson.common
+
 from synapse.api.room_versions import RoomVersions
 from synapse.federation.transport.client import SendJoinParser
 from synapse.util import ExceptionBundle
@@ -117,8 +119,17 @@ class SendJoinParserTestCase(TestCase):
         coro_3 = Mock()
         coro_3.close = Mock(side_effect=RuntimeError("Couldn't close coro 3"))
 
+        original_coros = parser._coros
         parser._coros = [coro_1, coro_2, coro_3]
 
+        # Close the original coroutines. If we don't, when we garbage collect them
+        # they will throw, failing the test. (Oddly, this only started in CPython 3.11).
+        for coro in original_coros:
+            try:
+                coro.close()
+            except ijson.common.IncompleteJSONError:
+                pass
+
         # Send half of the data to the parser
         parser.write(serialisation[: len(serialisation) // 2])