Updating ose-agent-installer-node-agent-container image to be consist…

…ent with ART (#637)

Reconciling with https://github.com/openshift/ocp-build-data/tree/4022cd290f00a44d667dda03f2d78d84a488c7ed/images/ose-agent-installer-node-agent.yml

Co-authored-by: AOS Automation Release Team <noreply@redhat.com>

.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.ocp

@@ -1,11 +1,11 @@
 
-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/assisted-installer-agent
 COPY . . 
 RUN make build
 
-FROM registry.ci.openshift.org/ocp/4.15:base-rhel9
+FROM registry.ci.openshift.org/ocp/4.16:base-rhel9
 
 LABEL io.openshift.release.operator=true