Add emulated NVMe to IsDiskPresent results

Add emulated NVMe to IsDiskPresent results

IsDiskPresent currently only reports the presence of emulated IDE disks. When
using emulated NVMe disks, its possible to start booting off the emulated disk,
but have XenVbd 'take over' resulting in storage requests to the emulated NVMe
disk timing out and failing. This results in a Windows error on boot
"Status 0xc000000e. A required device isnt connected or can't be accessed"

Query the CompatibleIDs and, if present, add the last CompatibleID to emulated
objects of type PCI. When querying if a disk is preset, also check for PCI
devices which match the CompatibleID "PCI\CC_0108". This will prevent XenVbd
enumerating a PV disk which is has a matching emulated NVMe device.

Signed-off-by: Owen Smith <owen.smith@citrix.com>