Option to add labels to replica pods

[pschichtel]

Describe the problem/challenge you have

I have velero setup in my cluster to backup everything by default unless labeled with velero.io/exclude-from-backup: "true". This makes sure that I don't accidentally forget to backup something important.

Since jiva replicas uses normal PVCs under the hood, velero does its thing and backups their content, even though the actual jiva volume has also been backed up. Currently there doesn't seem to be an option to add labels to the replica pods.

Describe the solution you'd like

Some why to add labels to replica pods.