Updating ose-network-tools-container image to be consistent with ART

Reconciling with https://github.com/openshift/ocp-build-data/tree/c78b2b27f47b41d5d59449c863f3dea6eaa988b7/images/ose-network-tools.yml

.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-8-release-golang-1.21-openshift-4.16

Dockerfile

@@ -1,12 +1,12 @@
-FROM registry.ci.openshift.org/ocp/builder:rhel-8-golang-1.20-openshift-4.15 AS builder
+FROM registry.ci.openshift.org/ocp/builder:rhel-8-golang-1.21-openshift-4.16 AS builder
 WORKDIR /go/src/github.com/openshift/network-tools
 COPY . .
 
 # needed for ovnkube-trace
-FROM registry.ci.openshift.org/ocp/4.15:ovn-kubernetes AS ovnkube-trace
+FROM registry.ci.openshift.org/ocp/4.16:ovn-kubernetes AS ovnkube-trace
 
 # tools (openshift-tools) is based off cli
-FROM registry.ci.openshift.org/ocp/4.15:tools
+FROM registry.ci.openshift.org/ocp/4.16:tools
 COPY --from=builder /go/src/github.com/openshift/network-tools/debug-scripts/ /opt/bin/
 COPY --from=ovnkube-trace /usr/bin/ovnkube-trace /usr/bin/