style: ruff format and the lint rules of the driver standard

Mechanical: ruff format, and ruff check --fix with the rule set every NAPALM
driver uses (E, F, I, UP, B at line length 100, Python 3.10). What ruff
cannot fix comes in the next commit.

napalm_openwrt/config_mixin.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
@@ -50,7 +49,9 @@ class OpenWrtConfigMixin(ConfigLifecycleMixin):
         if self._candidate_config is None:
             raise MergeConfigException("No candidate configuration is staged.")
 
-        ex_cls = ReplaceConfigException if self._candidate_mode == "replace" else MergeConfigException
+        ex_cls = (
+            ReplaceConfigException if self._candidate_mode == "replace" else MergeConfigException
+        )
 
         self._backup_config = self._send_command("uci export")