[Feature] Allow configuring the resulting StorageClass name in Container Storage `StoragePool`

[felfa01]

Is your feature request related to a problem? Please describe.
I'd like to be able to configure the name that the resulting StorageClass will have when deploying a StoragePool. One of my use cases would be to migrate from CSI Drivers to Azure Container Storage without requiring my tenants to update their PVC manifests with a new StorageClassName.

This was previously available in the now deprecated apiVersion v1alpha1 under .spec.poolType.azureDisk.storageClassName.

Describe the solution you'd like

apiVersion: containerstorage.azure.com/v1alpha1
kind: StoragePool
metadata:
  name: my-storage-pool-name
  namespace: acstor
spec:
  storageClassName: my-storage-class-name # A new field for setting the resulting StorageClass name
  poolType:
    azureDisk:
      skuName: Premium_LRS
  resources:
    requests:
      storage: 1Ti

Describe alternatives you've considered
Use the deprecated apiVersion v1alpha1?