fix(linux/glad): implement EGL_IMG_context_priority support

[psyke83]

Description

Try to create EGL context with high priority if EGL_IMG_context_priority is available.

May help with VAAPI encoder throttling during high GPU usage (needs testing).

Screenshot

Issues Fixed or Closed

• Resolves: Inconsistent FPS in Certain Games #4693
• Closes: feat(linux): async_depth configuration for VA-API #4745

Roadmap Issues

Type of Change

• feat: New feature (non-breaking change which adds functionality)
• fix: Bug fix (non-breaking change which fixes an issue)
• docs: Documentation only changes
• style: Changes that do not affect the meaning of the code (white-space, formatting, missing semicolons, etc.)
• refactor: Code change that neither fixes a bug nor adds a feature
• perf: Code change that improves performance
• test: Adding missing tests or correcting existing tests
• build: Changes that affect the build system or external dependencies
• ci: Changes to CI configuration files and scripts
• chore: Other changes that don't modify src or test files
• revert: Reverts a previous commit
• BREAKING CHANGE: Introduces a breaking change (can be combined with any type above)

Checklist

• Code follows the style guidelines of this project
• Code has been self-reviewed
• Code has been commented, particularly in hard-to-understand areas
• Code docstring/documentation-blocks for new or existing methods/components have been added or updated
• Unit tests have been added or updated for any new or modified functionality

AI Usage

• None: No AI tools were used in creating this PR
• Light: AI provided minor assistance (formatting, simple suggestions)
• Moderate: AI helped with code generation or debugging specific parts
• Heavy: AI generated most or all of the code changes

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[psyke83]

Pinging @inkatail to test a possible alternative to async_depth modification. Vulkan encoding won't be affected by this PR, but it may help resolve VAAPI encoder throttling during high GPU usage.

[codecov]

Bundle Report

Bundle size has no change ✅

[codecov]

Codecov Report

❌ Patch coverage is 0% with 17 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (master@b5b905b). Learn more about missing BASE report.
⚠️ Report is 1 commits behind head on master.
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
src/platform/linux/graphics.cpp	0.00%	16 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #4857   +/-   ##
=========================================
  Coverage          ?   17.85%           
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  Files             ?      106           
  Lines             ?    21970           
  Branches          ?     9820           
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  Hits              ?     3923           
  Misses            ?    14077           
  Partials          ?     3970           

Flag	Coverage Δ
Archlinux	12.31% <0.00%> (?)
FreeBSD-14.3-amd64	14.03% <0.00%> (?)
Homebrew-ubuntu-22.04	14.67% <0.00%> (?)
Linux-AppImage	12.82% <0.00%> (?)
Windows-AMD64	14.98% <ø> (?)
Windows-ARM64	13.38% <ø> (?)
macOS-arm64	18.60% <ø> (?)
macOS-x86_64	17.07% <ø> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
src/platform/linux/graphics.cpp	2.33% <0.00%> (ø)

[inkatail]

Pinging @inkatail to test a possible alternative to async_depth modification. Vulkan encoding won't be affected by this PR, but it may help resolve VAAPI encoder throttling during high GPU usage.

@psyke83 Unfortunately, this PR doesn't seem to improve it at least for me, logs seem to report that the Priority is HIGH but in games the performance is still weird