fix: resolve yamllint errors

- Fix line length in meta/argument_specs.yml (wrap long description)
- Remove extra blank lines in molecule/default/collections.yml
- Fix line lengths in tasks/main.yml (wrap long messages)
- Remove trailing spaces from tasks/main.yml
- Ensure all YAML files pass yamllint with relaxed profile

meta/argument_specs.yml

@@ -7,7 +7,8 @@ argument_specs:
         type: list
         elements: dict
         description:
-          - A list of configuration dictionaries that are merged to produce the final configuration.
+          - A list of configuration dictionaries that are merged to
+            produce the final configuration.
           - Each element must have a 'name' key (filename).
       bind9_default_config:
         type: list