complete `make fullclean` after PR #507

Created by: garloff

After #507, we have an additional root volume that we may need to clean up in make fullclean. We also have the opportunity to identify FIP addresses due to the added tag in #507.

Plan:

• Option --force-fip-cleanup to remove all unassociated FIPs, otherwise only remove the FIPs that we could pinpoint to the cleaned capi prefix before plus the one that we can now find from the tag.
• Clean the root volume from the capi management host
• Option --force-pvc-cleanup to remove all persistent volumes (from k8s clusters)