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/

synapse/util/patch_inline_callbacks.py

@@ -21,7 +21,7 @@
 import functools
 import sys
 from types import GeneratorType
-from typing import Any, Callable, Generator, List, TypeVar, cast
+from typing import Any, Callable, Generator, TypeVar, cast
 
 from typing_extensions import ParamSpec
 
@@ -56,7 +56,7 @@ def do_patch() -> None:
         @functools.wraps(f)
         def wrapped(*args: P.args, **kwargs: P.kwargs) -> "Deferred[T]":
             start_context = current_context()
-            changes: List[str] = []
+            changes: list[str] = []
             orig: Callable[P, "Deferred[T]"] = orig_inline_callbacks(
                 _check_yield_points(f, changes)
             )
@@ -126,7 +126,7 @@ def do_patch() -> None:
 
 def _check_yield_points(
     f: Callable[P, Generator["Deferred[object]", object, T]],
-    changes: List[str],
+    changes: list[str],
 ) -> Callable:
     """Wraps a generator that is about to be passed to defer.inlineCallbacks
     checking that after every yield the log contexts are correct.