Third-party stubs: audit more Callable[<parameters>, Any] annotations (#8233)

stubs/waitress/waitress/runner.pyi

@@ -9,4 +9,4 @@ def match(obj_name: str) -> tuple[str, str]: ...
 def resolve(module_name: str, object_name: str) -> Any: ...
 def show_help(stream: TextIOWrapper, name: str, error: str | None = ...) -> None: ...
 def show_exception(stream: TextIOWrapper) -> None: ...
-def run(argv: Sequence[str] = ..., _serve: Callable[..., Any] = ...) -> None: ...
+def run(argv: Sequence[str] = ..., _serve: Callable[..., object] = ...) -> None: ...