Is there an existing issue for the same feature request?
Is your feature request related to a problem?
No response
Describe the feature you'd like
Follow up #410
Currently, only backup taken by operator is supported to restore (external backup can be adopted by manually create a backup CR, but this is cumbersome), we should also support adopting external backup asset in an more convenient way.
Describe implementation you've considered
No response
Documentation, Adoption, Use Case, Migration Strategy
No response
Additional information
No response