DevWorkspace fails to backup image if internal OpenShift registry is used

[tolusha]

Description

DevWorkspace fails to backup image if internal OpenShift registry is used

How To Reproduce

Test backup following #1530

config:
  routing:
    defaultRoutingClass: basic
  workspace:
    backupCronJob:
      enable: true
      registry:
        path: image-registry.openshift-image-registry.svc.cluster.local
      schedule: '* * * * *'
    imagePullPolicy: Always

Expected behavior

Successful backup

Additional context

Using mounted service account token for registry authentication
Error: failed to validate the credentials for image-registry.openshift-image-registry.svc.cluster.local: Get "https://image-registry.openshift-image-registry.svc.cluster.local/v2/": dial tcp 172.30.17.225:443: i/o timeou