ebs br: backup against no tikv store is not failed #53784
Description
Bug Report
Please answer these questions before submitting your issue. Thanks!
1. Minimal reproduce step (Required)
Issue a backup to a tidb cluster with 0 tikv replica, as described in pingcap/tidb-operator#5658
2. What did you expect to see? (Required)
The backup failed
3. What did you see instead (Required)
The backup is not failed or succeed