Kube-proxy support for k8s_node_name

[bonclay7]

In the following dashboard, use the k8s_node_name label instead of instance for consistency across the dashboards

aws-observability-accelerator/artifacts/grafana-dashboards/eks/kube-proxy/kube-proxy.json

Line 1126 in c4819a9

"query": "label_values(up{job=\"$job\", cluster=\"$cluster\"}, instance)",

Need to update all the queries in panels as well

[youwalther65]

Definitely makes sense. Will pick it up most probably end next week or the week after.