Wrong image override is used in ignition server

Currently, we unconditionally use an image mapping from the management
cluster if a mapping exists for ocp-release-dev or ocp/release.
When the individual images do not use those registries, the wrong
mapping is used.

4.14

Always

1.Create an ICSP on a management cluster:

apiVersion: operator.openshift.io/v1alpha1
kind: ImageContentSourcePolicy
metadata:
  name: image-policy-39
spec:
  repositoryDigestMirrors:
  - mirrors:
    - quay.io/openshift-release-dev/ocp-release
    - pull.q1w2.quay.rhcloud.com/openshift-release-dev/ocp-release
    source: quay.io/openshift-release-dev/ocp-release

2. Create a HostedCluster that uses a CI release

Nodes never join because ignition server is looking up the wrong image for the CCO and MCO.

Nodes can join the cluster.