TALM - precache does not begin if version is unspecified even if image is already specified in clusterversion policy

CGU precache does not begin with following error when clusterversion policy does not include desiredUpdate.version spec. This should not be needed when desiredUpdate.image is already specified. 

As a side note, when both version and image are specified, image should take the priority.

  - lastTransitionTime: "2022-12-10T21:01:05Z"
    message: unable to find version  on update graph on url http://helix21.lab.eng.tlv2.redhat.com:8080/images/upgrade-graph_stable-4.12?channel=stable-4.13
    reason: InvalidPlatformImage
    status: "False"
    type: Validated

4.12

100%

1. ocp upgrade policy includes following clusterversion spec: 

        object-templates:
        - complianceType: Musthave
          objectDefinition:
            apiVersion: config.openshift.io/v1
            kind: ClusterVersion
            metadata:
              name: version
            spec:
              channel: stable-4.13
              desiredUpdate:
                force: true
                image: registry.ocp-edge-cluster-0.qe.lab.redhat.com:5000/openshift-release-dev/ocp-release@sha256:0cac0d49cb9a5f9d708c7f64b0998cfc19e7b4cbb35c48bb4a2cf6e0f7ea3f82
              upstream: http://helix21.lab.eng.tlv2.redhat.com:8080/images/upgrade-graph_stable-4.12
        remediationAction: Inform

3. start precache via CGU using above policy

precache does not begin with following error   

- lastTransitionTime: "2022-12-10T21:01:05Z"
    message: unable to find version  on update graph on url http://helix21.lab.eng.tlv2.redhat.com:8080/images/upgrade-graph_stable-4.12?channel=stable-4.13
    reason: InvalidPlatformImage
    status: "False"
    type: Validated
 

precache starts and succeeds

channel, upstream and desiredUpdate.version should not be required when desiredUpdate.image is specified.