AWS clusters: check if gp3 or gp2 is used for new clusters default StorageClass

[consideRatio]

If we create a new AWS cluster (using the latest eksctl CLI!), I'd like us to inspect if we get a default StorageClass of gp2 or gp3. It seems gp3 is cheaper without a drawback, so we should probably look to get it as the default.

[yuvipanda]

I created the GHG cluster just now, and gp2 is the default.

apiVersion: v1
items:
- apiVersion: storage.k8s.io/v1
  kind: StorageClass
  metadata:
    annotations:
      kubectl.kubernetes.io/last-applied-configuration: |
        {"apiVersion":"storage.k8s.io/v1","kind":"StorageClass","metadata":{"annotations":{"storageclass.kubernetes.io/is-default-class":"true"},"name":"gp2"},"parameters":{"fsType":"ext4","type":"gp2"},"provisioner":"kubernetes.io/aws-ebs","volumeBindingMode":"WaitForFirstConsumer"}
      storageclass.kubernetes.io/is-default-class: "true"
    creationTimestamp: "2023-08-01T03:43:50Z"
    name: gp2
    resourceVersion: "289"
    uid: d38c2360-7d52-42fc-b008-e24089226258
  parameters:
    fsType: ext4
    type: gp2
  provisioner: kubernetes.io/aws-ebs
  reclaimPolicy: Delete
  volumeBindingMode: WaitForFirstConsumer
- apiVersion: storage.k8s.io/v1
  kind: StorageClass
  metadata:
    annotations:
      meta.helm.sh/release-name: support
      meta.helm.sh/release-namespace: support
    creationTimestamp: "2023-08-01T04:14:22Z"
    labels:
      app.kubernetes.io/managed-by: Helm
    name: ssd
    resourceVersion: "5997"
    uid: 30c73159-3b83-49b0-a210-c938bba580c4
  parameters:
    type: pd-ssd
  provisioner: kubernetes.io/gce-pd
  reclaimPolicy: Delete
  volumeBindingMode: Immediate
kind: List
metadata:
  resourceVersion: ""

[consideRatio]

With #4769, we get gp3 in new k8s clusters going onwards, so I'll go for a close here.