Try switching from restic to kopia in velero
The backup tool velero currently uses restic as backend for backing up persistent data. Since recently, there is an alternative called kopia. We could try switching from restic to kopia. Possible benefits:
- It's supposed to be faster.
- Velero is doing a lot of calls to the object store every five minutes. It's possible with kopia the number of calls is different -- unfortunately the five-minute interval is still not configurable: https://github.com/vmware-tanzu/velero/issues/2820