Update backup job's default backoff limit to 1

[dkwon17]

What does this PR do?

Updates the default backup cron job backoff limit to 1:

What issues does this PR fix or reference?

Is it tested? How?

Tested with this catalog source:

apiVersion: operators.coreos.com/v1alpha1
kind: CatalogSource
metadata:
  name: devworkspace-operator-catalog
  namespace: openshift-marketplace
spec:
  displayName: DevWorkspace Operator Catalog
  image: 'quay.io/dkwon17/devworkspace-operator-index:update-backoff'
  publisher: Red Hat
  sourceType: grpc
  updateStrategy:
    registryPoll:
      interval: 5m

After installing DWO, create a new DWOC object that does not define the backup job's backoff limit:

kind: DevWorkspaceOperatorConfig
metadata:
  name: devworkspace-operator-config
  namespace: openshift-operators
apiVersion: controller.devfile.io/v1alpha1
config:                                                                                                                                         
  workspace:
    backupCronJob:
      enable: true
      registry:
        path: default-route-openshift-image-registry.apps.sno-ocp-415.my.openshift.lab
      schedule: '* * * * *'
      oras:
        extraArgs: '--insecure'

After creating the DWOC object, the backoffLimit: 1 should be added automatically.

PR Checklist

• E2E tests pass (when PR is ready, comment /test v8-devworkspace-operator-e2e, v8-che-happy-path to trigger)
  • v8-devworkspace-operator-e2e: DevWorkspace e2e test
  • v8-che-happy-path: Happy path for verification integration with Che

[openshift-ci]

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This pull-request has been approved by: dkwon17

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