VMSS Flex Disk deleteOption changes (#18433)

* disk delete option for vmss flex

* prettier changes

* update parameters

Co-authored-by: Kimberly Yip Chang <kiyipcha@microsoft.com>

Author: kimberlyyipc

specification/compute/resource-manager/Microsoft.Compute/stable/2022-03-01/ComputeRP/virtualMachineScaleSet.json

@@ -3815,6 +3815,10 @@
         "managedDisk": {
           "description": "The managed disk parameters.",
           "$ref": "#/definitions/VirtualMachineScaleSetManagedDiskParameters"
+        },
+        "deleteOption": {
+          "$ref": "./computeRPCommon.json#/definitions/DeleteOption",
+          "description": "Specifies whether OS Disk should be deleted or detached upon VMSS Flex deletion (This feature is available for VMSS with Flexible OrchestrationMode only). <br><br> Possible values: <br><br> **Delete** If this value is used, the OS disk is deleted when VMSS Flex VM is deleted.<br><br> **Detach** If this value is used, the OS disk is retained after VMSS Flex VM is deleted. <br><br> The default value is set to **Delete**. For an Ephemeral OS Disk, the default value is set to **Delete**. User cannot change the delete option for Ephemeral OS Disk."
         }
       },
       "required": [
@@ -3851,6 +3855,10 @@
         "managedDisk": {
           "description": "The managed disk parameters.",
           "$ref": "#/definitions/VirtualMachineScaleSetManagedDiskParameters"
+        },
+        "deleteOption": {
+          "$ref": "./computeRPCommon.json#/definitions/DeleteOption",
+          "description": "Specifies whether OS Disk should be deleted or detached upon VMSS Flex deletion (This feature is available for VMSS with Flexible OrchestrationMode only). <br><br> Possible values: <br><br> **Delete** If this value is used, the OS disk is deleted when VMSS Flex VM is deleted.<br><br> **Detach** If this value is used, the OS disk is retained after VMSS Flex VM is deleted. <br><br> The default value is set to **Delete**. For an Ephemeral OS Disk, the default value is set to **Delete**. User cannot change the delete option for Ephemeral OS Disk."
         }
       },
       "description": "Describes virtual machine scale set operating system disk Update Object. This should be used for Updating VMSS OS Disk."
@@ -3896,6 +3904,10 @@
           "type": "integer",
           "format": "int64",
           "description": "Specifies the bandwidth in MB per second for the managed disk. Should be used only when StorageAccountType is UltraSSD_LRS. If not specified, a default value would be assigned based on diskSizeGB."
+        },
+        "deleteOption": {
+          "$ref": "./computeRPCommon.json#/definitions/DeleteOption",
+          "description": "Specifies whether data disk should be deleted or detached upon VMSS Flex deletion (This feature is available for VMSS with Flexible OrchestrationMode only).<br><br> Possible values: <br><br> **Delete** If this value is used, the data disk is deleted when the VMSS Flex VM is deleted.<br><br> **Detach** If this value is used, the data disk is retained after VMSS Flex VM is deleted.<br><br> The default value is set to **Delete**."
         }
       },
       "required": [