Description of problem:

while trying to run schedule backup every 10 minutes using crontab format "*/10 * * * *" - add schedule failed 

valid crontab format - */10 * * * *

Tried 2 formats:
1) spec:
  schedule: */10 * * * * - "error: error parsing backup-scheduler-60pods.yaml: error converting YAML to JSON: yaml: line 9: did not find expected alphabetic or numeric character"
2) spec:
  schedule: */10 * * * * -
status:
  phase: FailedValidation
  validationErrors:
  - 'invalid schedule: Failed to parse int from *: strconv.Atoi: parsing "
*": invalid
    syntax'

Version-Release number of selected component (if applicable):

OCP 4.10.26

OADP 1.1.0-74

How reproducible:

Steps to Reproduce:
1. Create schedule backup yaml
2. oc apply -f {schedule.yaml} 
3. oc get schedule -A

Actual results:

add schedule failed

Expected results:

succeed to add schedule

Additional info:

Example schedule.yaml :

apiVersion: velero.io/v1
kind: Schedule
metadata:
  name: backup-scheduler-60pods-every-10min
  namespace: openshift-adp
  labels:
    velero.io/storage-location: example-velero-1
spec:
  schedule: */10 * * * *
OR
  schedule: */10 * * * *
  template:

Create a test to verify the right format: (print date every 5 minutes)
1) 

[root@f01-h14-000-r640 ~]# cat test.sh 
#!/bin/bash

date >> test-time.log

2) [root@f01-h14-000-r640 oadp-helpers]# crontab -l
*/5 * * * * /root/test.sh

3) [root@f01-h14-000-r640 ~]# head test-time.log
Thu Sep 29 15:50:01 UTC 2022
Thu Sep 29 15:55:01 UTC 2022
Thu Sep 29 16:00:01 UTC 2022
Thu Sep 29 16:05:01 UTC 2022
Thu Sep 29 16:10:01 UTC 2022
Thu Sep 29 16:15:01 UTC 2022
Thu Sep 29 16:20:01 UTC 2022
Thu Sep 29 16:25:01 UTC 2022
Thu Sep 29 16:30:01 UTC 2022
Thu Sep 29 16:35:01 UTC 2022