* Add support for regional GKE clusters in google_container_cluster:
* implement operation wait for v1beta1 api
* implement container clusters get for regional clusters
* implement container clusters delete for regional cluster
* implement container clusters update for regional cluster
* simplify logic by using generic 'location' instead of 'zone' and 'region'
* implement a method to generate the update function and refactor
* rebase and fix
* reorder container_operation fns
* cleanup
* add import support and docs
* additional locations cleanup
* vendor container/v1beta1
* revendor container/v1beta1
* add beta scaffolding for gke resources
* fix json unmarshal error
* fix issues with trying to convert interface instead of struct
* same fixes but for node pool
* move setid calls back