Move sdn to RHEL9 base image

Author: joepvd

.ci-operator.yaml

@@ -1,4 +1,4 @@
 build_root_image:
   name: release
   namespace: openshift
-  tag: rhel-8-release-golang-1.21-openshift-4.16
+  tag: rhel-9-release-golang-1.21-openshift-4.16

images/sdn/Dockerfile.rhel

@@ -10,19 +10,19 @@ COPY . .
 RUN make build --warn-undefined-variables
 RUN CGO_ENABLED=1 make build GO_BUILD_PACKAGES="github.com/openshift/sdn/cmd/openshift-sdn-cni" --warn-undefined-variables
 
-FROM registry.ci.openshift.org/ocp/4.16:base
+FROM registry.ci.openshift.org/ocp/4.16:base-rhel9
 
-ARG ovsver=2.13
-
-RUN mkdir -p /opt/cni/bin/rhel9
-COPY --from=rhel9-builder /go/src/github.com/openshift/sdn/openshift-sdn-cni /opt/cni/bin/rhel9/openshift-sdn
+ARG ovsver=3.1
 
 RUN mkdir -p /opt/cni/bin/rhel8
-COPY --from=rhel8-builder /go/src/github.com/openshift/sdn/openshift-sdn-node /usr/bin/
-COPY --from=rhel8-builder /go/src/github.com/openshift/sdn/openshift-sdn-controller /usr/bin/
-COPY --from=rhel8-builder /go/src/github.com/openshift/sdn/openshift-sdn-cni /opt/cni/bin/openshift-sdn
 COPY --from=rhel8-builder /go/src/github.com/openshift/sdn/openshift-sdn-cni /opt/cni/bin/rhel8/openshift-sdn
-COPY --from=rhel8-builder /go/src/github.com/openshift/sdn/host-local /usr/bin/cni/osdn-host-local
+
+RUN mkdir -p /opt/cni/bin/rhel9
+COPY --from=rhel9-builder /go/src/github.com/openshift/sdn/openshift-sdn-node /usr/bin/
+COPY --from=rhel9-builder /go/src/github.com/openshift/sdn/openshift-sdn-controller /usr/bin/
+COPY --from=rhel9-builder /go/src/github.com/openshift/sdn/openshift-sdn-cni /opt/cni/bin/openshift-sdn
+COPY --from=rhel9-builder /go/src/github.com/openshift/sdn/openshift-sdn-cni /opt/cni/bin/rhel9/openshift-sdn
+COPY --from=rhel9-builder /go/src/github.com/openshift/sdn/host-local /usr/bin/cni/osdn-host-local
 
 RUN INSTALL_PKGS=" \
       openvswitch${ovsver} container-selinux socat ethtool nmap-ncat \