Add PremiumV2_LRS option for NFS server deployments

[joshcoburn]

PremiumV2_LRS provides a very good cost/performance ratio, so this would be a good additional option for NFS server deployments.

Terraform azurerm_managed_disk supports this option.

[sayeun]

Opened internal ticket for PM review, PMCPFR-1535.

[github-actions]

This issue is stale because it has been open 30 days with no activity.