nixos/test-driver: apply ruff fixes & suggestions

nixos/lib/test-driver/test_driver/logger.py

@@ -1,16 +1,17 @@
 # mypy: disable-error-code="no-untyped-call"
 # drop the above line when mypy is upgraded to include
 # https://github.com/python/typeshed/commit/49b717ca52bf0781a538b04c0d76a5513f7119b8
-from colorama import Style, Fore
-from contextlib import contextmanager
-from typing import Any, Dict, Iterator
-from queue import Queue, Empty
-from xml.sax.saxutils import XMLGenerator
 import codecs
 import os
 import sys
 import time
 import unicodedata
+from contextlib import contextmanager
+from queue import Empty, Queue
+from typing import Any, Dict, Iterator
+from xml.sax.saxutils import XMLGenerator
+
+from colorama import Fore, Style
 
 
 class Logger: