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.

tests/test_system_identity.py

@@ -9,6 +9,7 @@ from __future__ import annotations
 from unittest.mock import patch
 
 from napalm_device_types import SYSTEM_IDENTITY_COMMAND, SystemIdentityMixin
+
 from napalm_proxmox.driver import ProxmoxDriver
 
 # pve-dual, a Supermicro X10DRL-i: the product serial is the board vendor's default.