UPSTREAM: <carry>: Updating openshift-enterprise-hyperkube-container image to be consistent with ART for 4.21

Reconciling with https://github.com/openshift/ocp-build-data/tree/4fbe3fab45239dc4be6f5d9d98a0bf36e0274ec9/images/openshift-enterprise-hyperkube.yml

Author: AOS Automation Release Team

.ci-operator.yaml

@@ -1,4 +1,4 @@
 build_root_image:
   name: release
   namespace: openshift
-  tag: rhel-9-release-golang-1.24-openshift-4.20
+  tag: rhel-9-release-golang-1.24-openshift-4.21

openshift-hack/images/hyperkube/Dockerfile.rhel

@@ -1,4 +1,4 @@
-FROM registry.ci.openshift.org/ocp/builder:rhel-9-golang-1.24-openshift-4.20 AS builder
+FROM registry.ci.openshift.org/ocp/builder:rhel-9-golang-1.24-openshift-4.21 AS builder
 WORKDIR /go/src/k8s.io/kubernetes
 COPY . .
 RUN make WHAT='cmd/kube-apiserver cmd/kube-controller-manager cmd/kube-scheduler cmd/kubelet cmd/watch-termination openshift-hack/cmd/k8s-tests-ext' && \
@@ -8,7 +8,7 @@ RUN make WHAT='cmd/kube-apiserver cmd/kube-controller-manager cmd/kube-scheduler
     /tmp/build && \
     gzip /tmp/build/k8s-tests-ext
 
-FROM registry.ci.openshift.org/ocp/4.20:base-rhel9
+FROM registry.ci.openshift.org/ocp/4.21:base-rhel9
 RUN yum install -y --setopt=tsflags=nodocs --setopt=skip_missing_names_on_install=False iproute && yum clean all
 COPY --from=builder /tmp/build/* /usr/bin/
 LABEL io.k8s.display-name="OpenShift Kubernetes Server Commands" \