Design proposal: Plugin based data protection framework

[AmitRoushan]

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespace from that line:

/kind new feature
/kind bug fix
/kind cleanup
/kind revert change
/kind design
/kind documentation
/kind enhancement

/kind design

What this PR does / why we need it:
Kahu supports different volume backup and backup location with Provider framework. The framework provides a plugin approach to integrated Volume/BackupLocation driver in runtime itself.
Currently Volume/BackupLocation drivers are deployed either as “Deployment” or “Statefulset”. The solution works perfectly if the drive uses APIs to connect with respective servers. But it would not work

• If backup/restore drivers are data movers (like Restic).
• If volumes are topologically distributed
• Kubernetes does not support hot mount functionality, So if any Volume backup driver needs “Volume” mount for backup/restore. Current approach will be failure

The PR propose an alternate job based plugin approach to handle data protection.

Which issue(s) this PR fixes:

Fixes #6

Test Report Added?:

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespace from that line:
/kind TESTED
/kind NOT-TESTED
NA
Test Report:

Special notes for your reviewer: