Upload Volume Snapshot to S3 and provision from S3

[Adphi]

Is your feature request related to a problem? Please describe.
We use Velero with the csi plugin to backup our kubernetes cluster and cannot set up a multi-zone disaster recovery plan because the volume snapshots are attached to it.

Describe the solution you'd like
Scaleway allowing to copy a snapshot on the s3, we would like to automate this in the volume snapshot class.
This will then allow us to provision a volume by copying from the s3 (or through a volumesnapshot / volumesnapshotcontent) and thus have a multi-zone Disaster Recovery Plan solution.

Describe alternatives you've considered
We could use the Velero's Restic integration, but we know from experience that this does not work well for large volumes (>500GiB).

Additional context
Add any other context or screenshots about the feature request here.