Improve CI tests and install the most recent CheckMK agent
- Add support for Debian 11 and Ubuntu 22.04, drop Debian 9
- Improve caching in GitLab CI
- Use molecule-podman instead of molecule-docker
- Use the most recent available checkm deb package
Note: The network needs to be created manually for now. There is a bug in the molecule-podman implementation: https://github.com/ansible-community/molecule-podman/issues/28. The PR is pending.
Edited by Huste, Tobias