Updating ose-multus-networkpolicy-container image to be consistent wi…

…th ART (#44)

Reconciling with https://github.com/openshift/ocp-build-data/tree/654ae8be9f1b82e97b4cf8937c3d8fe9f46f36ce/images/multus-networkpolicy.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-8-release-golang-1.20-openshift-4.15
+  tag: rhel-9-release-golang-1.20-openshift-4.15

Dockerfile.openshift

@@ -1,12 +1,12 @@
 # This dockerfile is specific to building Multus for OpenShift
-FROM registry.ci.openshift.org/ocp/builder:rhel-8-golang-1.20-openshift-4.15 AS build
+FROM registry.ci.openshift.org/ocp/builder:rhel-9-golang-1.20-openshift-4.15 AS build
 
 # Add everything
 ADD . /usr/src/multi-networkpolicy-iptables
 WORKDIR /usr/src/multi-networkpolicy-iptables
 RUN CGO_ENABLED=0 go build ./cmd/multi-networkpolicy-iptables/
 
-FROM registry.ci.openshift.org/ocp/4.15:base
+FROM registry.ci.openshift.org/ocp/4.15:base-rhel9
 RUN dnf install -y iptables
 COPY --from=build /usr/src/multi-networkpolicy-iptables/multi-networkpolicy-iptables /usr/bin
 WORKDIR /usr/bin