Needs approval from an approver in each of these files:
- ~~[OWNERS](https://github.com/kubernetes/kops/blob/master/OWNERS)~~ [hakman]
Approvers can indicate their approval by writing `/approve` in a comment
Approvers can cancel approval by writing `/approve cancel` in a comment
This lets us use labels (or annotations), meaning we can experiment with different clouds without changing the API.
We also add initial (experimental/undocumented) support for exposing a "Metal" provider.