[K8S010] Migrate In-tree storage plugin to CSI driver

[bryantbiggs]

Use case

Starting in Kubernetes v1.17, the in-tree storage plugin was marked as deprecated and it will be removed in EKS v1.23. Users need to install to the EBS CSI driver prior to upgrading to EKS v1.23

The in-tree Amazon EBS storage provisioner is deprecated. If you are upgrading your cluster to version 1.23, then you must first install the Amazon EBS driver before updating your cluster. For more information, see Amazon EBS CSI migration frequently asked questions. If you have pods running on a version 1.22 or earlier cluster, then you must install the Amazon EBS driver before updating your cluster to version 1.23 to avoid service interruption. https://docs.aws.amazon.com/eks/latest/userguide/ebs-csi-migration-faq.html

Solution/User Experience

• Report if the cluster does not have the EBS CSI driver installed
• Report on the usage of kubernetes.io/aws-ebsStorageClass and recommend users update to the new API resource groups provided by the CSI

Alternative solutions

None

[bryantbiggs]

Need to find a definitive way of determining if the EBS CSI driver is installed. Straightforward if installed via EKS Addon, less so if users have installed as self-managed (i.e. - Helm chart)