[epic] Move project to Kubernetes-SIGs

[kvaps]

Hey everyone,

We've established a community effort to develop a unified etcd-operator. This project is entirely community-driven and currently comprises mainly members of the Russian-speaking Kubernetes community. Although we've just begun, there's already significant activity, with approximately 10 active developers onboard.

We want two things:

1. To donate this project to CNCF:
   • https://github.com/cncf/sandbox/issues/91
2. Get a place under kubernetes-sigs:
   • https://github.com/kubernetes/community/pull/7796
   • https://github.com/kubernetes/org/pull/4839

Let's collect feedback from potencial adopters:

• [ ] Cozystack (We are!)
• [ ] Cilium https://github.com/cilium/cilium/issues/31858
• [ ] Mayastor https://github.com/openebs/mayastor/issues/1630
• [ ] Vitastor https://github.com/vitalif/vitastor/issues/62
• [ ] Kamaji https://github.com/clastix/kamaji/issues/431
• [ ] Stolon https://github.com/sorintlab/stolon/issues/920
• [ ] Patroni
• [ ] Goteleport https://github.com/gravitational/teleport/issues/40344
• [ ] LINSTOR https://github.com/piraeusdatastore/piraeus-operator/issues/643
• [ ] HyperShift https://github.com/openshift/hypershift/issues/3852

And infrom previous etcd-operator's developers:

• [ ] coreos/etcd-operator
• [ ] bitnami/etcd
• [x] gardener/etcd-druid
• [x] clastix/kamaji-etcd
• [x] aenix-io/kubernetes-in-kubernetes
• [ ] improbable-eng/etcd-cluster-operator
• [x] elemir/etcdops
• [x] openshift/cluster-etcd-operator
• [ ] warmchang/etcd-operator