Follow up from RHDEVDOCS-2227.

Could we:

• update the list of images in the install guide's restricted environment section to the latest digests [once per release]

But also, in case we forget or a CVE respin happens that makes the list no longer valid...

• provide a scriptlet for users to use to get the list of images, eg.,
  downstream

  $➔ curl -sSLo- https://raw.githubusercontent.com/redhat-developer/codeready-workspaces-operator/crw-2.4-rhel-8/manifests/codeready-workspaces.csv.yaml | yq -r '.spec.relatedImages[].image'

  (where crw-2.4-rhel-8 should be crw-{prod-ver}-rhel-8

  upstream

  $➔ curl -sSLo- https://raw.githubusercontent.com/eclipse/che-operator/master/olm/eclipse-che-preview-openshift/deploy/olm-catalog/eclipse-che-preview-openshift/7.19.2/eclipse-che-preview-openshift.v7.19.2.clusterserviceversion.yaml | yq -r '.spec.relatedImages[].image' | sort | uniq
  

  (then for upstream you need to remove all the redundant, unused digests )

• link to the install guide from the admin guide section re: image puller, but add a note that 'Not all images can be prepulled this way. Scratch images like machine-exec, images without a sleep command installed, and images that mount volumes in the dockerfile are not supported for pre-pulling on OpenShift.'

That will make the doc more accurate, and you won't need to maintain two nearly-identical tables in two documents.