Updating openshift-enterprise-registry-container image to be consiste…

…nt with ART

Reconciling with https://github.com/openshift/ocp-build-data/tree/c78b2b27f47b41d5d59449c863f3dea6eaa988b7/images/openshift-enterprise-registry.yml

.ci-operator.yaml

@@ -1,4 +1,4 @@
 build_root_image:
   name: release
   namespace: openshift
-  tag: rhel-9-release-golang-1.20-openshift-4.15
+  tag: rhel-9-release-golang-1.21-openshift-4.16

Dockerfile.rhel7

@@ -1,9 +1,9 @@
-FROM registry.ci.openshift.org/ocp/builder:rhel-9-golang-1.20-openshift-4.15 AS builder
+FROM registry.ci.openshift.org/ocp/builder:rhel-9-golang-1.21-openshift-4.16 AS builder
 WORKDIR /go/src/github.com/openshift/image-registry
 COPY . .
 RUN hack/build-go.sh
 
-FROM registry.ci.openshift.org/ocp/4.15:base-rhel9
+FROM registry.ci.openshift.org/ocp/4.16:base-rhel9
 RUN yum install -y rsync && yum clean all && rm -rf /var/cache/yum
 COPY --from=builder /go/src/github.com/openshift/image-registry/_output/local/bin/dockerregistry /usr/bin/
 COPY images/dockerregistry/config.yml /