docs, host-devices: Fix lspci example and T4 resource name - #1045

Two small corrections in docs/compute/host-devices.md.

lspci example. The command is lspci -DD, but the sample output shows the class code [0302] and the
[10de:1eb8] vendor:device pair, which only -nn prints. The sample also has 0000.65:00.0 where the domain
separator is :. On one of my nodes (pciutils 3.14.0):

$ lspci -DD | grep -i nvidia
0000:01:00.0 VGA compatible controller: NVIDIA Corporation GA106M [GeForce RTX 3060 Mobile / Max-Q] (rev a1)
$ lspci -Dnn | grep -i nvidia
0000:01:00.0 VGA compatible controller [0300]: NVIDIA Corporation GA106M [GeForce RTX 3060 Mobile / Max-Q] [10de:2560] (rev a1)

T4 resource name. The T4 entry in the permittedHostDevices example sets externalResourceProvider: true, so
the GPU is advertised by an external device plugin and resourceName / deviceName must be the name that plugin
uses. The NVIDIA KubeVirt GPU device plugin upper-cases the name it builds from pci.ids
(strings.ToUpper in pkg/device_plugin/device_plugin.go), so the T4 is advertised as nvidia.com/TU104GL_TESLA_T4.
Extended resource names are case sensitive, so a VMI copied from the example asks for nvidia.com/TU104GL_Tesla_T4,
which no node advertises. The same mismatch is in the plugin's own examples (NVIDIA/kubevirt-gpu-device-plugin#89,
fix proposed in NVIDIA/kubevirt-gpu-device-plugin#222).

KubeVirt's own device plugin (without externalResourceProvider) registers resourceName exactly as written, so
the other examples are fine. On my cluster resourceName: "nvidia.com/GA106M_GeForce_RTX_3060_Mobile" without
externalResourceProvider shows up in the node's allocatable with that exact casing.

Changes:

• lspci -DD|grep NVIDIA → lspci -Dnn | grep NVIDIA, and 0000.65:00.0 → 0000:65:00.0 in the sample output.
• nvidia.com/TU104GL_Tesla_T4 → nvidia.com/TU104GL_TESLA_T4 in the KubeVirt CR and the VMI examples.
• Under "External providers": the name must match what the external plugin advertises, an example for the NVIDIA
  plugin, and how to list the names on a node.

I used Claude (Anthropic) to help with the research and wording, including the checks on my nodes above. The commit carries
an Assisted-by trailer.