Features - Initial implementation of Azure NetApp File

[arnaudlh]

Initial implementation of Azure NetApp Files:

• azurerm_netapp_account
• azurerm_netapp_pool
• azurerm_netapp_snapshot
• azurerm_netapp_volume

[xpillons]

@arnaudlh there is a need for additional CAF random names for netapp account, pools and volume. Here are the rules to follow :

• Account must be unique for the subscription.
• Capacity pool name must be unique for each NetApp account
• A volume name must be unique within each capacity pool. It must be at least three characters long. You can use any alphanumeric characters.