fix: what bandit and the remaining lint rules found

- set_interface: the except Exception: pass around reading the old
  untagged VLANs now logs at debug level (B110), with a module logger.
- nosec for the empty password field of get_users (B105, now a named
  constant); a false positive.
- Two docstrings quoting tabular device output keep their lines (noqa
  E501); a long docstring and an error message are shortened or split;
  the unused duplex column is named _duplex.
- tests: a get_facts test named SHOW_INTERFACE, which does not exist; it
  is SHOW_INTERFACE_STATUS. raise ... from exc.

tests/unit/test_driver.py

@@ -96,7 +96,7 @@ class TestGetFacts:
 
         # _get_interface_list needs show interface
         driver.device.send_command.side_effect = lambda cmd, **kw: (
-            SHOW_SYSTEM_INFO if "system-info" in cmd else SHOW_INTERFACE
+            SHOW_SYSTEM_INFO if "system-info" in cmd else SHOW_INTERFACE_STATUS
         )
 
         facts = driver.get_facts()

tests/unit/test_ssh_host_key.py

@@ -76,7 +76,7 @@ def test_a_changed_key_is_refused():
         try:
             raise paramiko.BadHostKeyException("10.0.0.8", SERVER_KEY, OTHER_KEY)
         except paramiko.SSHException as exc:  # what netmiko does with it
-            raise NetmikoTimeoutException(f"A paramiko SSHException occurred: {exc}")
+            raise NetmikoTimeoutException(f"A paramiko SSHException occurred: {exc}") from exc
 
     driver = _driver(seen, SshHostKey.of(OTHER_KEY))
     with patch(HANDLER, side_effect=refuse):