Combine with vm-operator-api

[janitha]

Currently the vm-operator's api resides in https://github.com/vmware-tanzu/vm-operator-api this should be brought in to this repo.

[dramdass]

I think it still warrants some discussion whether this should be combined. Clients who vendor the API may not want to bring in all the dependencies brought in by the implementation.

[timothysc]

It's common practice to contain everything in the main repo primarily for re-visioning. So long as you manage your type deps there is no reason not to.