Extend DRM labels

[Deezzir]

Issue

Add chip label to the node_drm_card_info metric.

Solution

Extend the DRM collector to have the chip label from the ClassDRMCardAMDGPUStats.
The change was also proposed in the procfs repo, and the PR is awaiting review.

Context

The DRM metrics are impossible to relate to the hwmon metrics, which export other helpful information about AMD GPUs. The extension will allow us to relate metrics from both 'hwmon and 'drm and, in turn, create a better GPU Dashboard for AMD with proper filtering and labelling.

Demo example metrics:

node_drm_card_info{card="card0",chip="0000:9d:00_0_0000:9e:00_0",memory_vendor="samsung",power_performance_level="auto",unique_id="",vendor="amd"} 1
node_drm_gpu_busy_percent{card="card0"} 0
node_drm_memory_gtt_size_bytes{card="card0"} 4.294967296e+09
node_drm_memory_gtt_used_bytes{card="card0"} 8.081408e+06
node_drm_memory_vis_vram_size_bytes{card="card0"} 2.68435456e+08
node_drm_memory_vis_vram_used_bytes{card="card0"} 5.439488e+06
node_drm_memory_vram_size_bytes{card="card0"} 4.294967296e+09
node_drm_memory_vram_used_bytes{card="card0"} 5.57056e+06
node_scrape_collector_duration_seconds{collector="drm"} 0.000537504
node_scrape_collector_success{collector="drm"} 1

and:

...
node_hwmon_chip_names{chip="0000:9d:00_0_0000:9e:00_0",chip_name="amdgpu"} 1
...