Automatic merge from submit-queue (batch tested with PRs 64140, 64898, 65022, 65037, 65027). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>. Add charm support for OpenStack Integrator **What this PR does / why we need it**: Add charm support for OpenStack Integrator Also rename interfaces for existing integrator charms **Release note**: ```release-note NONE ```