Import from collections.abc wherever possible (#7635)

stdlib/contextlib.pyi

@@ -1,21 +1,8 @@
 import sys
 from _typeshed import Self, StrOrBytesPath
+from collections.abc import AsyncGenerator, AsyncIterator, Awaitable, Callable, Generator, Iterator
 from types import TracebackType
-from typing import (  # noqa: Y027
-    IO,
-    Any,
-    AsyncGenerator,
-    AsyncIterator,
-    Awaitable,
-    Callable,
-    ContextManager,
-    Generator,
-    Generic,
-    Iterator,
-    Protocol,
-    TypeVar,
-    overload,
-)
+from typing import IO, Any, ContextManager, Generic, Protocol, TypeVar, overload  # noqa: Y027
 from typing_extensions import ParamSpec, TypeAlias
 
 if sys.version_info >= (3, 11):