Isort preparations (#16555)

* Don't treat typing as an "in-between" module for import order

That was a < 3.5 era thing.

* Tighten scope of some pylint unused-import disables

To avoid isort moving a top level one around, undesirably broadening its
scope.

homeassistant/helpers/config_validation.py

@@ -7,7 +7,6 @@ from urllib.parse import urlparse
 from socket import _GLOBAL_DEFAULT_TIMEOUT
 import logging
 import inspect
-
 from typing import Any, Union, TypeVar, Callable, Sequence, Dict
 
 import voluptuous as vol