Migrate s3 crons to cluster's leader mon
Related to https://gitlab.cern.ch/ai/it-puppet-hostgroup-ceph/-/merge_requests/214
Do NOT merge unless https://gitlab.cern.ch/ai/it-puppet-hostgroup-ceph/-/merge_requests/214 is merged. Contains breaking changes
Changes:
- tools/s3-tools/s3-quota-checker.py will be called be the leader mon. No need to pass cluster name (which, actually, leads to error due to broken naming)
- tools/s3-tools/ceph-rgw-user-stats.py was formerly distributed by puppet. Now brought here and updated to python3.