stdlib: Improve a bunch of __(a)exit__ methods (#7571)

stdlib/multiprocessing/sharedctypes.pyi

@@ -3,6 +3,7 @@ from collections.abc import Callable, Iterable, Sequence
 from ctypes import _CData, _SimpleCData, c_char
 from multiprocessing.context import BaseContext
 from multiprocessing.synchronize import _LockLike
+from types import TracebackType
 from typing import Any, Generic, Protocol, TypeVar, overload
 from typing_extensions import Literal
 
@@ -82,7 +83,9 @@ class SynchronizedBase(Generic[_CT]):
     def get_obj(self) -> _CT: ...
     def get_lock(self) -> _LockLike: ...
     def __enter__(self) -> bool: ...
-    def __exit__(self, *args: Any) -> None: ...
+    def __exit__(
+        self, __exc_type: type[BaseException] | None, __exc_val: BaseException | None, __exc_tb: TracebackType | None
+    ) -> None: ...
 
 class Synchronized(SynchronizedBase[_SimpleCData[_T]], Generic[_T]):
     value: _T