graphics_card: add drm_node field (New)

[Saviq]

Description

Adds a drm_node field to the graphics_card resource:

bus: pci                                                                                                                                                                                                                              
category: VIDEO                                                                                                                                                                                                                       
driver: i915                                                                                                                                                                                                                          
drm_node: /dev/dri/card1                                                                                                                                                                                                              gpu_count: 1
index: 1                                                                                                                                                                                                                              path: /devices/pci0000:00/0000:00:02.0
pci_device_name: 0000:00:02.0                                                                                                                                                                                                         prime_gpu_offload: Off
product: Meteor Lake-P [Intel Arc Graphics]                                                                                                                                                                                           product_id: 32085
product_slug: Meteor_Lake_P__Intel_Arc_Graphics_                                                                                                                                                                                      subproduct_id: 9
subvendor_id: 61713                                                                                                                                                                                                                   switch_to_cmd: false
vendor: Intel Corporation                                                                                                                                                                                                             vendor_id: 32902
vendor_slug: Intel_Corporation

Resolved issues

Closes: #2283

Documentation

N/A

Tests

The com.canonical.certification::graphics_card resource has drm_node on my Intel HW above and on a Raspberry Pi:

bus: drm
category: VIDEO
driver: v3d
drm_node: /dev/dri/card0
gpu_count: 2
index: 1
name: dri/card0
path: /devices/platform/axi/1002000000.v3d/drm/card0
prime_gpu_offload: Off
product: drm-platform-1002000000_v3d
product_slug: drm_platform_1002000000_v3d
switch_to_cmd: false
vendor: PCI ID 0x0
vendor_slug: PCI_ID_0x0

bus: drm
category: VIDEO
driver: vc4-drm
drm_node: /dev/dri/card1
gpu_count: 2
index: 2
name: dri/card1
path: /devices/platform/axi/axi:gpu/drm/card1
prime_gpu_offload: Off
product: drm-platform-axi_gpu
product_slug: drm_platform_axi_gpu
switch_to_cmd: false
vendor: PCI ID 0x0
vendor_slug: PCI_ID_0x0

[codecov]

Codecov Report

❌ Patch coverage is 25.00000% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 55.30%. Comparing base (c47a234) to head (2a2d61b).

Files with missing lines	Patch %	Lines
providers/resource/bin/graphics_card_resource.py	25.00%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2341      +/-   ##
==========================================
- Coverage   55.31%   55.30%   -0.01%     
==========================================
  Files         413      413              
  Lines       44503    44511       +8     
  Branches     8203     8205       +2     
==========================================
+ Hits        24615    24617       +2     
- Misses      19030    19036       +6     
  Partials      858      858              

Flag	Coverage Δ
provider-resource	39.65% <25.00%> (-0.12%)	⬇️

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[Saviq]

Do we still need to support Py3.5/3.6? :)