stdlib: add many missing __del__ methods (#11042)

stdlib/multiprocessing/connection.pyi

@@ -31,6 +31,7 @@ class _ConnectionBase:
     def __exit__(
         self, exc_type: type[BaseException] | None, exc_value: BaseException | None, exc_tb: types.TracebackType | None
     ) -> None: ...
+    def __del__(self) -> None: ...
 
 class Connection(_ConnectionBase): ...
 

stdlib/multiprocessing/managers.pyi

@@ -216,3 +216,4 @@ if sys.version_info >= (3, 8):
         def get_server(self) -> SharedMemoryServer: ...
         def SharedMemory(self, size: int) -> _SharedMemory: ...
         def ShareableList(self, sequence: Iterable[_SLT] | None) -> _ShareableList[_SLT]: ...
+        def __del__(self) -> None: ...

stdlib/multiprocessing/pool.pyi

@@ -112,6 +112,7 @@ class Pool:
     def __exit__(
         self, exc_type: type[BaseException] | None, exc_val: BaseException | None, exc_tb: TracebackType | None
     ) -> None: ...
+    def __del__(self) -> None: ...
 
 class ThreadPool(Pool):
     def __init__(

stdlib/multiprocessing/shared_memory.pyi

@@ -20,6 +20,7 @@ class SharedMemory:
     def size(self) -> int: ...
     def close(self) -> None: ...
     def unlink(self) -> None: ...
+    def __del__(self) -> None: ...
 
 class ShareableList(Generic[_SLT]):
     shm: SharedMemory