Improve ansible-lint invocation during CI

[artis3n]

Ansible-lint's newly supports outputting GHA-formatted errors and warnings that annotate onto a PR, which is awesome. Ansible-lint currently runs in a lint stage on every Molecule run, creating 20+ duplicates of any annotation, e.g.

Migrate Ansible-lint to a dedicated task so it annotates at most once and mute its invocation during the matrix executions.