Clusters to clean up:
- [x] P1434: deployment-internship
- [ ] staging-workers
- [ ] production-cassandra
- [ ] poc-argoworklow
- [ ] gitlab-rocq
- [ ] cluster-graphql3
- [ ] cluster-argo
Plan: https://hedgedoc.softwareheritage.org/v5oz5CQXRdqOv4x-xWJ7-Q?edit