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_interfaces.py

@@ -2,11 +2,7 @@
 
 from __future__ import annotations
 
-import pytest
-from tests.conftest import _build_mock_api, NODE_NETWORK
-from unittest.mock import patch
-
-from napalm_proxmox.driver import ProxmoxDriver
+from tests.conftest import NODE_NETWORK
 
 
 class TestGetInterfaces:
@@ -89,10 +85,18 @@ class TestGetInterfacesCounters:
         result = driver.get_interfaces_counters()
         eth0 = result["eth0"]
         for field in (
-            "tx_errors", "rx_errors", "tx_discards", "rx_discards",
-            "tx_octets", "rx_octets", "tx_unicast_packets", "rx_unicast_packets",
-            "tx_multicast_packets", "rx_multicast_packets",
-            "tx_broadcast_packets", "rx_broadcast_packets",
+            "tx_errors",
+            "rx_errors",
+            "tx_discards",
+            "rx_discards",
+            "tx_octets",
+            "rx_octets",
+            "tx_unicast_packets",
+            "rx_unicast_packets",
+            "tx_multicast_packets",
+            "rx_multicast_packets",
+            "tx_broadcast_packets",
+            "rx_broadcast_packets",
         ):
             assert field in eth0, f"Missing field: {field}"