Ability to node reap non-ASG nodes

[kteague-tasktop]

Feature request

Governor relies on k8s nodes being provisioned by an ASG. For k8s nodes that are provisioned using other methods, such as the new-ish Karpenter project, they do not belong to an ASG. Governor currently will not interact with those nodes. It would be good if Governor could reap Karpenter provisioned nodes.

FYI, about Karpenter specifically, it has the ability to reap old notes (a node TTL) although this feature doesn't have the configuration such as maxReapNodes that Governor currently has. For reaping NotReady or other unhealthy nodes, that is currently not in-scope for the Karpenter project.