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 was merged.

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.

Example metrics:

# DRM
node_drm_card_info{card="card0",chip="0000:9d:00_0_0000:9e:00_0",memory_vendor="unknown",power_performance_level="auto",unique_id="",vendor="amd"} 1

# HWMON
node_hwmon_chip_names{chip="0000:9d:00_0_0000:9e:00_0",chip_name="amdgpu"} 1
node_hwmon_fan_enable{chip="0000:9d:00_0_0000:9e:00_0",sensor="fan1"} 0
node_hwmon_fan_max_rpm{chip="0000:9d:00_0_0000:9e:00_0",sensor="fan1"} 6900
node_hwmon_fan_min_rpm{chip="0000:9d:00_0_0000:9e:00_0",sensor="fan1"} 1800
node_hwmon_fan_rpm{chip="0000:9d:00_0_0000:9e:00_0",sensor="fan1"} 2035
node_hwmon_fan_target_rpm{chip="0000:9d:00_0_0000:9e:00_0",sensor="fan1"} 2035
node_hwmon_freq_freq_mhz{chip="0000:9d:00_0_0000:9e:00_0",sensor="mclk"} 1500
node_hwmon_freq_freq_mhz{chip="0000:9d:00_0_0000:9e:00_0",sensor="sclk"} 214
node_hwmon_in_volts{chip="0000:9d:00_0_0000:9e:00_0",sensor="in0"} 0.85
node_hwmon_power_average_watt{chip="0000:9d:00_0_0000:9e:00_0",sensor="power1"} 6.075
node_hwmon_power_cap_default_watt{chip="0000:9d:00_0_0000:9e:00_0",sensor="power1"} 35
node_hwmon_power_cap_max_watt{chip="0000:9d:00_0_0000:9e:00_0",sensor="power1"} 35
node_hwmon_power_cap_min_watt{chip="0000:9d:00_0_0000:9e:00_0",sensor="power1"} 0
node_hwmon_power_cap_watt{chip="0000:9d:00_0_0000:9e:00_0",sensor="power1"} 35
node_hwmon_pwm{chip="0000:9d:00_0_0000:9e:00_0",sensor="pwm1"} 49
node_hwmon_pwm_enable{chip="0000:9d:00_0_0000:9e:00_0",sensor="pwm1"} 2
node_hwmon_pwm_max{chip="0000:9d:00_0_0000:9e:00_0",sensor="pwm1"} 255
node_hwmon_pwm_min{chip="0000:9d:00_0_0000:9e:00_0",sensor="pwm1"} 0
node_hwmon_sensor_label{chip="0000:9d:00_0_0000:9e:00_0",label="edge",sensor="temp1"} 1
node_hwmon_sensor_label{chip="0000:9d:00_0_0000:9e:00_0",label="mclk",sensor="freq2"} 1
node_hwmon_sensor_label{chip="0000:9d:00_0_0000:9e:00_0",label="sclk",sensor="freq1"} 1
node_hwmon_sensor_label{chip="0000:9d:00_0_0000:9e:00_0",label="slowPPT",sensor="power1"} 1
node_hwmon_sensor_label{chip="0000:9d:00_0_0000:9e:00_0",label="vddgfx",sensor="in0"} 1
node_hwmon_temp_celsius{chip="0000:9d:00_0_0000:9e:00_0",sensor="temp1"} 42
node_hwmon_temp_crit_celsius{chip="0000:9d:00_0_0000:9e:00_0",sensor="temp1"} 97
node_hwmon_temp_crit_hyst_celsius{chip="0000:9d:00_0_0000:9e:00_0",sensor="temp1"} -273.15000000000003

[Deezzir]

@discordianfish and @SuperQ PTAL