Upstream just merged https://github.com/etcd-io/etcd/pull/16246

which refactors the way the dashboards are defined. We need to see whether our own jsonnet integration still works with that and we can still display dashboards in OpenShift.

See additional challenges they faced with the helm chart:
https://github.com/prometheus-community/helm-charts/pull/3880

AC:

• vendor upstream refactoring changes (usual update)
• ensure openshift dashboards are not affected by upstream change
• update the integration, if necessary