How to use Rollout to manage StatefulSet

[patrickant001]

Related discussion: #1346

We love the analysisruns, and want Argo Rollout to support StatefulSet.
We currently have a workaround to use control_pod as a mini-orchestrator: Rollout -> ReplicaSet -> control_pod -> StatefulSet -> worker_pods. The control_pod in here does not do any real work (except orchestration and readiness prob proxying), adds scheduling latency and extra failure domain. A simpler architecture like Rollout -> ReplicaSet -> StatefulSet -> worker_pods would be ideal.

I have two questions.

1. Are there any existing solution in the Argo ecosystem to support this use case easily?
2. If I write a StsReplicaSet CRD, and adds StsTemplate to the Rollout spec, would the community be interested?

[kostis-codefresh]

Please check #1635 and #3964