Add pod clique pod index to pod name for better visibility

[steved]

What you would like to be added?

Pod clique set and pod clique scaling group indexes are added to each pod name in order to disambiguate their naming. I would like the pod clique index to also be part of the pod name.

Why is this needed?

When investigating a pod failure that includes the hostname, such as ubuntu-0-worker-0, it isn't possible to easily pinpoint the actual pod name to debug:

$ kubectl get po
NAME                    READY   STATUS    RESTARTS   AGE
ubuntu-0-worker-2tnab   1/1     Running   0          7h41m
ubuntu-0-worker-5mfde   1/1     Running   0          7h41m

Custom columns can help, but require additional tools or aliases and don't work with standard options like -o wide:

$ kubectl get pods -o custom-columns=NAME:.metadata.name,INDEX:'.metadata.labels.grove\.io/podclique-pod-index',STATUS:.status.phase
NAME                    INDEX   STATUS
ubuntu-0-worker-2tnab   0       Running
ubuntu-0-worker-5mfde   1       Running

Ideally, adding the pod clique pod index would make it easier to pinpoint the exact pod:

$ kubectl get po
NAME                      READY   STATUS    RESTARTS   AGE
ubuntu-0-worker-0-2tnab   1/1     Running   0          7h41m
ubuntu-0-worker-1-5mfde   1/1     Running   0          7h41m