Add option to remove node after cordon/drain

**Describe the feature**
I'd like the option for NTH v2 to actually remove the node from the cluster (e.g. `kubectl delete node`) when cordon/drain has completed; the lifecycle would still terminate the instance.

**Is the feature request related to a problem?**
The idiomatic way that controllers work is with caches and only responding to events so it's important that the node removal be an actual Kubernetes event so that other controllers know that it's happened.

**Describe alternatives you've considered**
n/a