Use type hinting generics in standard collections (#19046)

aka PEP 585, added in Python 3.9

 - https://peps.python.org/pep-0585/
 - https://docs.astral.sh/ruff/rules/non-pep585-annotation/

tests/app/test_openid_listener.py

@@ -17,7 +17,6 @@
 # [This file includes modifications made by New Vector Limited]
 #
 #
-from typing import List
 from unittest.mock import Mock, patch
 
 from parameterized import parameterized
@@ -58,7 +57,7 @@ class FederationReaderOpenIDListenerTests(HomeserverTestCase):
             (["openid"], "auth_fail"),
         ]
     )
-    def test_openid_listener(self, names: List[str], expectation: str) -> None:
+    def test_openid_listener(self, names: list[str], expectation: str) -> None:
         """
         Test different openid listener configurations.
 
@@ -106,7 +105,7 @@ class SynapseHomeserverOpenIDListenerTests(HomeserverTestCase):
             (["openid"], "auth_fail"),
         ]
     )
-    def test_openid_listener(self, names: List[str], expectation: str) -> None:
+    def test_openid_listener(self, names: list[str], expectation: str) -> None:
         """
         Test different openid listener configurations.