This PR will allow users to issue `osctl config generate`, tweak the
configs to their liking, then use those configs to call `osctl cluster
create`.
Example workflow:
```
osctl config generate my-cluster https://10.5.0.2:6443 -o ./my-cluster
** tweaky tweak **
osctl cluster create --name my-cluster --input-dir "$PWD/my-cluster"
```
Signed-off-by: Spencer Smith <robertspencersmith@gmail.com>
75d9f7b454