Updating openshift-enterprise-tests-container image to be consistent with ART for 4.21

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

images/tests/Dockerfile.rhel

@@ -1,11 +1,11 @@
-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/github.com/openshift/origin
 COPY . .
 RUN make; \
     mkdir -p /tmp/build; \
     cp /go/src/github.com/openshift/origin/openshift-tests /tmp/build/openshift-tests
 
-FROM registry.ci.openshift.org/ocp/4.20:tools
+FROM registry.ci.openshift.org/ocp/4.21:tools
 COPY --from=builder /tmp/build/openshift-tests /usr/bin/
 
 RUN PACKAGES="git gzip util-linux" && \