Support imagestreams for RHEL9

[phracek]

This pull request adds support for testing imagestreams for RHEL9 on OpenShift.

[phracek]

[test-all]

[phracek]

RHEL9 - OpenShift 4 -13 tests are passsing:

-----------------------------------------------
Running test test_postgresql_imagestream (starting at 2022-11-07 13:57:34+01:00) ... 
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Running image stream test for stream test/imagestreams/postgresql-rhel.json and template test/examples/postgresql-ephemeral-template.json
Now using project "sclorg-test-21502" on server "https://api.core-serv-ocp.hosted.psi.rdu2.redhat.com:6443".

You can add applications to this project with the 'new-app' command. For example, try:

    oc new-app rails-postgresql-example

to build a new example application in Ruby. Or use kubectl to deploy a simple Kubernetes application:

    kubectl create deployment hello-node --image=k8s.gcr.io/e2e-test-images/agnhost:2.33 -- /agnhost serve-hostname

secret/6340056-core-services-apps-ci-pull-secret created
imagestream.image.openshift.io/postgresql created
secret/postgresql created
service/postgresql created
deploymentconfig.apps.openshift.io/postgresql created
Waiting for postgresql pod becoming ready ........... DONE
project.project.openshift.io "sclorg-test-21502" deleted
Project sclorg-test-21502 was deleted properly
Tests were run for image rhel9/postgresql-13:1
Uncompressed size of the image: 405MB
Compressed size of the image: 135MB
 [PASSED] for 'openshift-remote-cluster' test_postgresql_integration (00:00:55)
 [PASSED] for 'openshift-remote-cluster' test_postgresql_imagestream (00:00:36)

OpenShift tests for rhel9/postgresql-13:1 succeeded.

[phracek]

[test-all]