Add RollingUpgradePolicy support to VirtualMachineScaleSet

Azure's VMSS resource supports several fields inside properties.upgradePolicy.rollingUpgradePolicy [rollingUpgradePolicy ](https://learn.microsoft.com/en-us/azure/templates/microsoft.compute/2023-03-01/virtualmachinescalesets?pivots=deployment-language-arm-template#rollingupgradepolicy-1)which Farmer does not currently expose.