[BUG] kbcli cluster describe-backup Examples error: can not found any backups

[JashBook]

Describe the bug
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4. See error

➜  ~ kubectl get backup
NAME                                            POLICY                                     METHOD          REPO                    STATUS      TOTAL-SIZE   DURATION   DELETION-POLICY   CREATION-TIME          COMPLETION-TIME        EXPIRATION-TIME
backup-default-postgres-ibnwgo-20250423140706   postgres-ibnwgo-postgresql-backup-policy   pg-basebackup   backuprepo-kbcli-test   Completed   16651657     10s        Delete            2025-04-23T06:07:06Z   2025-04-23T06:07:16Z   
backup-default-postgres-wjvtpb-20250423134342   postgres-wjvtpb-postgresql-backup-policy   pg-basebackup   backuprepo-kbcli-test   Completed   2912314      17s        Delete            2025-04-23T05:43:42Z   2025-04-23T05:43:58Z   
➜  ~ 
➜  ~ kbcli cluster describe-backup --help
Describe a backup.

Aliases:
describe-backup, desc-backup

Examples:
  # describe a backup
  kbcli cluster describe-backup backup-default-mycluster-20230616190023

Options:
    --names=[]:
	Backup names

Usage:
  kbcli cluster describe-backup BACKUP-NAME [flags] [options]

Use "kbcli options" for a list of global command-line options (applies to all commands).
➜  ~ 
➜  ~ kbcli cluster describe-backup backup-default-postgres-ibnwgo-20250423140706
error: can not found any backups
➜  ~ 
➜  ~ 
➜  ~ kbcli cluster describe-backup --names backup-default-postgres-ibnwgo-20250423140706
Name: backup-default-postgres-ibnwgo-20250423140706	Cluster: postgres-ibnwgo	Namespace: default	

Spec:
  Method:             pg-basebackup
  Policy Name:        postgres-ibnwgo-postgresql-backup-policy

Actions:
  dp-backup-0:        
    ActionType:         Job
    WorkloadName:       dp-backup-0-backup-default-postgres-ibnwgo-20250423140706-88c93
    TargetPodName:      postgres-ibnwgo-postgresql-1
    Phase:              Completed
    Start Time:         Apr 23,2025 14:07 UTC+0800
    Completion Time:    Apr 23,2025 14:07 UTC+0800

Status:
  Phase:              Completed
  Total Size:         16651657
  ActionSet Name:     postgresql-basebackup
  Repository:         backuprepo-kbcli-test
  Duration:           10s
  Start Time:         Apr 23,2025 14:07 UTC+0800
  Completion Time:    Apr 23,2025 14:07 UTC+0800
  Path:               /default/postgres-ibnwgo-2bb5c2c9-a5dc-477b-ae1f-22a8f63d2c3f/postgresql/backup-default-postgres-ibnwgo-20250423140706
  Time Range Start:   Apr 23,2025 14:07 UTC+0800
  Time Range End:     Apr 23,2025 14:07 UTC+0800

Warning Events: <none>

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[wangyelei]

fixed at #604