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). Mapping and
Iterable come from collections.abc, imports are sorted. What ruff cannot
fix comes in the next commit.

tests/test_discovery.py

@@ -53,7 +53,7 @@ def test_idrac_and_ilo_landing_pages_are_recognised():
 
 
 def test_a_switch_page_scores_nothing():
-    page = '<html><head><title>Loading...</title></head><body>Web Switch</body></html>'
+    page = "<html><head><title>Loading...</title></head><body>Web Switch</body></html>"
     assert _score(page) == 0.0