USHIFT-6951: use OCP payload images instead of registry.redhat.io

The release JSONs and kustomization overlays referenced
registry.redhat.io pullspecs that don't exist for pre-release
builds. Switch to quay.io/openshift-release-dev/ocp-v5.0-art-dev
pullspecs from the OCP 5.0 EC2 payload, matching the pattern
used by core components and OLM. Also fix rebase.sh to use the
ART pullspec directly instead of remapping to registry.redhat.io.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: copejon

assets/optional/metrics-server/kustomization.aarch64.yaml

@@ -1,4 +1,4 @@
 images:
   - name: quay.io/openshift/kube-metrics-server
-    newName: registry.redhat.io/openshift4/kube-metrics-server-rhel9
-    digest: sha256:f3005f47c12b265745081503e03e7403d2cf71a7bda84f15ec4411409e5a8eb8
+    newName: quay.io/openshift-release-dev/ocp-v5.0-art-dev
+    digest: sha256:35daed97a2d279f2543334cfb209f81be440e423042cc7dae6784985d71f2f8d

assets/optional/metrics-server/kustomization.x86_64.yaml

@@ -1,4 +1,4 @@
 images:
   - name: quay.io/openshift/kube-metrics-server
-    newName: registry.redhat.io/openshift4/kube-metrics-server-rhel9
-    digest: sha256:0a7797ec4b905af06705b70f2f6d1c36578abf899e98ed71a701364a4edfd177
+    newName: quay.io/openshift-release-dev/ocp-v5.0-art-dev
+    digest: sha256:cb84656c5b900f21b7984f917ac0473cf7b5e58cd1ec7d782b01fbe99d39bee7

assets/optional/metrics-server/release-metrics-server-aarch64.json

@@ -3,6 +3,6 @@
     "base": "placeholder"
   },
   "images": {
-    "metrics_server": "registry.redhat.io/openshift4/kube-metrics-server-rhel9@sha256:f3005f47c12b265745081503e03e7403d2cf71a7bda84f15ec4411409e5a8eb8"
+    "metrics_server": "quay.io/openshift-release-dev/ocp-v5.0-art-dev@sha256:35daed97a2d279f2543334cfb209f81be440e423042cc7dae6784985d71f2f8d"
   }
 }

assets/optional/metrics-server/release-metrics-server-x86_64.json

@@ -3,6 +3,6 @@
     "base": "placeholder"
   },
   "images": {
-    "metrics_server": "registry.redhat.io/openshift4/kube-metrics-server-rhel9@sha256:0a7797ec4b905af06705b70f2f6d1c36578abf899e98ed71a701364a4edfd177"
+    "metrics_server": "quay.io/openshift-release-dev/ocp-v5.0-art-dev@sha256:cb84656c5b900f21b7984f917ac0473cf7b5e58cd1ec7d782b01fbe99d39bee7"
   }
 }

scripts/auto-rebase/rebase.sh

@@ -1137,21 +1137,6 @@ update_metrics_images() {
         ["node_exporter"]="prometheus-node-exporter"
     )
 
-    # Maps release JSON key -> registry.redhat.io image path
-    declare -A METRICS_REDHAT_REGISTRY_MAP=(
-        ["metrics_server"]="registry.redhat.io/openshift4/kube-metrics-server-rhel9"
-        ["kube_state_metrics"]="registry.redhat.io/openshift4/ose-kube-state-metrics-rhel9"
-        ["node_exporter"]="registry.redhat.io/openshift4/ose-prometheus-node-exporter-rhel9"
-    )
-
-    # Maps kustomization placeholder -> registry.redhat.io image path
-    declare -A KUSTOMIZE_REDHAT_REGISTRY_MAP=(
-        ["quay.io/openshift/kube-metrics-server"]="registry.redhat.io/openshift4/kube-metrics-server-rhel9"
-        ["quay.io/openshift/kube-state-metrics"]="registry.redhat.io/openshift4/ose-kube-state-metrics-rhel9"
-        ["quay.io/openshift/node-exporter"]="registry.redhat.io/openshift4/ose-prometheus-node-exporter-rhel9"
-        ["quay.io/openshift/kube-rbac-proxy"]="registry.redhat.io/openshift4/ose-kube-rbac-proxy-rhel9"
-    )
-
     for goarch in amd64 arm64; do
         arch=${GOARCH_TO_UNAME_MAP["${goarch}"]:-noarch}
 
@@ -1173,10 +1158,8 @@ update_metrics_images() {
                 >&2 echo "ERROR: Release tag '${release_tag}' not found in payload for ${component_dir}"
                 return 1
             fi
-            local new_digest="${new_image#*@}"
-            local redhat_name="${METRICS_REDHAT_REGISTRY_MAP[$json_key]}"
             local component_release_json="${REPOROOT}/assets/optional/${component_dir}/release-${component_dir}-${arch}.json"
-            jq -n --arg base "$base_release" --arg img "${redhat_name}@${new_digest}" \
+            jq -n --arg base "$base_release" --arg img "${new_image}" \
                 "{\"release\": {\"base\": \$base}, \"images\": {\"${json_key}\": \$img}}" > "${component_release_json}"
 
             local kustomization_arch_file="${REPOROOT}/assets/optional/${component_dir}/kustomization.${arch}.yaml"
@@ -1203,7 +1186,7 @@ EOF
                     >&2 echo "ERROR: Image for release tag '${release_tag}' not found in payload for ${component_dir}"
                     return 1
                 fi
-                local new_image_name="${KUSTOMIZE_REDHAT_REGISTRY_MAP[$orig_image]}"
+                local new_image_name="${new_image%@*}"
                 local new_image_digest="${new_image#*@}"
 
                 cat <<EOF >> "${kustomization_arch_file}"