vhost/windows: Make sure host drive is properly cleaned up

Signed-off-by: Michal Berger <michalx.berger@intel.com>
Change-Id: I53ec43c62f5ab7bef2719119252eec3c7c6b90d9
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/7269
Reviewed-by: Karol Latecki <karol.latecki@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Paul Luse <paul.e.luse@intel.com>
Reviewed-by: Krzysztof Karas <krzysztof.karas@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>

test/vhost/windows/windows_scsi_compliance.ps1

@@ -70,4 +70,6 @@ foreach($disk in $disks)
     .\scsicompliance.exe /Device \\.\$($vol.DriveLetter): /Operation Test /Scenario Common | tee "C:\SCSI\WIN_SCSI_2_$label.log"
     start-sleep 2
     mv .\scsicompliance.wtl ".\WIN_SCSI_2_$label.wtl"
+    # Cleanup the drive
+    Clear-Disk -Number $disk.Number -RemoveData -Confirm:$false
 }