Add Kopia SFTP support

[fastlorenzo]

Is your feature request related to a problem? Please describe.
I'm currently using Kopia with SFTP backend to store snapshots, I see Kanister only supports S3, Azure and GCP.

Describe the solution you'd like
It would be great if Kanister would support SFTP as a storage location for Kopia: https://kopia.io/docs/repositories/#sftp
I believe this would require adding some parameters to the Kanister Profile.
I'm not good enough at Go yet to be able to make a PR that wouldn't break anything else.

Describe alternatives you've considered
Using S3 as a storage, but less convenient for me as I have a big SFTP backup storage available.

Environment
Kubernetes Version/Provider: RKE2 1.25.3
Storage Provider: Rook CEPH / SFTP server for Kopia backups
Cluster Size (#nodes): 3 master + 3 workers
Data Size: variable, depends on the PVC to backup - couple of MB to ~250GB

Additional context
N/A

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[pavannd1]

Hey @fastlorenzo - thanks for the request!
We are working on improving the integration of Kopia in Kanister and will consider adding SFTP support with the other planned changes.

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This issue is closed due to inactivity. Feel free to reopen it, if it's still relevant.

[fastlorenzo]

Hi team, will this be considered and implemented? I would suggest to not close it to keep track. Thanks

[pavannd1]

Reopening

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