Support 10 or More Disks on Azure
Support 10 or More Disks on Azure

Fix a bug related to alphabetical vs numeric ordering to support >= 10
disks on a single Azure VM.

GoogleCloudPlatform/PerfKitBenchmarker,GoogleCloudPlatform/PerfKitBenchmarker,meteorfox/PerfKitBenchmarker,meteorfox/PerfKitBenchmarker,GoogleCloudPlatform/PerfKitBenchmarker,GoogleCloudPlatform/PerfKitBenchmarker