Mirror rhel-coreos-base and scos-base images to QCI (#59839)

Follow-up to #59544. The mirror service doesn't support mirroring from
private repos. Instead, we'll have the CoreOS pipeline push to app.ci.

Adjust the mirror config to mirror those images to QCI.

core-services/image-mirroring/_config.yaml

@@ -676,9 +676,13 @@ supplementalCIImages:
   stackrox/apollo-ci:stackrox-ui-test-0.4.4:
     image: quay.io/stackrox-io/apollo-ci:stackrox-ui-test-0.4.4
   coreos/scos-base:9:
-    image: quay.io/openshift-release-dev/ocp-v4.0-art-dev:c9s-coreos
+    namespace: coreos
+    name: scos-base
+    tag: "9"
   coreos/rhel-coreos-base:9.6:
-    image: quay.io/openshift-release-dev/ocp-v4.0-art-dev:rhel-9.6-coreos
+    namespace: coreos
+    name: rhel-coreos-base
+    tag: "9.6"
   coreos/coreos-assembler:latest:
     image: quay.io/coreos-assembler/coreos-assembler:latest
   coreos/coreos-assembler:4.18: