Proposal for passthrough

foo.yaml

  - name: image-scanner
    images:
      - name: image
        resource: image-provider
    templateRef:
      kind: ClusterImageTemplate
      options:
        - name: image-scanner-template
          selector:
            matchLabel:
              - key: has-scan
                value: yes
        - passthrough: image
          selector:
            matchLabel:
              - key: has-scan
                value: no