fix(ffmpeg): apply upstream patches to fix VAAPI leaks and crashes

[cgutman]

Description

These patches are necessary to address the regression reported in LizardByte/Sunshine#3268. It is typically just a leak, but it can become a crash in cases where we call eglTerminate() but the leaked VAAPI surfaces keep references to the DRI driver alive. On the next attempt to use EGL, it ends up invoking functions in a module that has been unloaded.

Screenshot

Issues Fixed or Closed

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Dependency update (updates to dependencies)
• Documentation update (changes to documentation)
• Repository update (changes to repository files, e.g. .github/...)

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated the in code docstring/documentation-blocks for new or existing methods/components