GA: Ultra Disk performance updates

The maximum provisioned IOPS and provisioned throughput on Azure Ultra Disk Storage is increased to 400,000 IOPS and 10,000 MB/s per disk. A single Ultra Disk can achieve the maximum IOPS and throughput of the largest Azure Virtual Machines (VMs), reducing the complexity of managing multiple disks striped together. The increased performance can also be leveraged by multiple Azure VMs when the Ultra Disk is configured as a shared disk. To learn more, read the [documentation](docs.microsoft.com/en-us/azure/virtual-machines/windows/disks-types#ultra-disk) * Ultra Disk Storage * Managed Disks * Azure Disk Storage * Features * Microsoft Ignite * [ Managed Disks](https://azure.microsoft.com/en-gb/services/managed-disks/)