Updating docs to include IKS in various places (#10047)

* Change product name

From IBM Cloud Container Service to IBM Cloud Kubernetes Service

* Adding IKS to the table of solutions

Not sure about where in the table it should be placed. The note said,
“The above table is ordered by version test/used in nodes, followed by
support level.”

* Adding IKS to Cloud Providers page

* Adding IBM Cloud Container Registry to private registry topic

* Updating language on cloud provider page

* Revising text for the registry entry

* Specifying that it's calico network policies

content/en/docs/setup/pick-right-solution.md

@@ -216,6 +216,7 @@ any                  | RKE          | multi-support    | flannel or canal
 any                  | [Gardener Cluster-Operator](https://kubernetes.io/blog/2018/05/17/gardener/) | multi-support | multi-support | [docs](https://gardener.cloud) | [Project/Community](https://github.com/gardener) and [Commercial]( https://cloudplatform.sap.com/)
 Alibaba Cloud Container Service For Kubernetes | ROS        | CentOS | flannel/Terway       | [docs](https://www.aliyun.com/product/containerservice)                    |  Commercial
 Agile Stacks       | Terraform   | CoreOS | multi-support | [docs](https://www.agilestacks.com/products/kubernetes) | Commercial
+IBM Cloud Kubernetes Service | | Ubuntu | calico | [docs](https://console.bluemix.net/docs/containers/container_index.html) | Commercial 
 
 
 {{< note >}}