Cherry pick 'fix/backup-job-should-mount-kas' into '4-8-stable'
What does this MR do?
Cherry-pick !1765 (merged) and bring the fixes for #2521 (closed) into 4-8-stable
Related issues
Edited by Jason Plum
Cherry-pick !1765 (merged) and bring the fixes for #2521 (closed) into 4-8-stable