Python code modernization, 3/n (#1157)

* Remove __metaclass__ = type.

for i in $(grep -REl '__metaclass__ = type' plugins/ tests/); do
  sed -e '/^__metaclass__ = type/d' -i $i;
done

* Remove super arguments, and stop inheriting from object.

tests/unit/plugins/module_utils/_api/fake_stat.py

@@ -9,8 +9,6 @@
 from __future__ import annotations
 
 
-__metaclass__ = type
-
 OBJ = {
     "read": "2015-02-11T19:20:46.667237763+02:00",
     "network": {