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/unit/test_snmp_agent.py

@@ -35,9 +35,11 @@ def driver():
     d._exit_config_mode = MagicMock()
     d._save_config = MagicMock()
     d._send_command = MagicMock(
-        side_effect=lambda cmd: SHOW_IP_INTERFACE
-        if cmd == "show ip interface"
-        else "Index  Community-Name  Access\n1      c0mm            read-only\n"
+        side_effect=lambda cmd: (
+            SHOW_IP_INTERFACE
+            if cmd == "show ip interface"
+            else "Index  Community-Name  Access\n1      c0mm            read-only\n"
+        )
     )
     return d