* Ansible: separate requirements files for supported ansible versions
* Ansible: allow using ansible 2.11
* CI: Exercise Ansible 2.9 and Ansible 2.11 in a basic AIO CI job
* CI: Allow running a reset test outside of idempotency tests and running it in stage1
* CI: move ubuntu18-calico-aio job to stage2 and relay only on ubuntu20 with the variously supported ansible versions for stage1
* CI: add capability to install collections or roles from ansible-galaxy to mitigate missing behavior in older ansible versions
