MK8S-80 - gha: Add workflows corresponding to what exist in metalk8s-registry-node-agent#11

vdaviot merged 7 commits intomainscality/disk-management-agent:mainfrom

improvement/MK8S-80-add-github-workflowsscality/disk-management-agent:improvement/MK8S-80-add-github-workflowsCopy head branch name to clipboard