message: Add Premium_LRS to enum values.
diff: "description": "Specifies the storage account type to be used to store the image. This property is not updatable.",
  "enum": [
  "Standard_LRS",
  - "Standard_ZRS"
  + "Standard_ZRS",
  + "Premium_LRS"
  ],
  "x-ms-enum": {
  "name": "StorageAccountType",
  "description": "Specifies the storage account type to be used to store the image. This property is not updatable.",
  "enum": [
  "Standard_LRS",
  - "Standard_ZRS"
  + "Standard_ZRS",
  + "Premium_LRS"
  ],
  "x-ms-enum": {
  "name": "StorageAccountType",
  