Patch Intel Media SDK to discover and dispatch to
`/run/opengl-driver/lib/libmfx-gen.so.1.2`.
This allows applications which depend on `intel-media-sdk` to use hardware
acceleration through `onevpl-intel-gpu` provided that it was added to
`hardware.opengl.extraPackages`. oneVPL-intel-gpu is the only supported
acceleration driver for newer Intel GPUs, meaning all integrated GPUs starting
with Alder Lake S/P.
This is important as applications may still want to build against
`intel-media-sdk` to support hardware acceleration on all Intel GPUs from
Broadwell to Rocket Lake and now newer platforms through oneVPL-intel-gpu.
E.g. the default build of ffmpeg > 6 will use `intel-media-sdk` rather than
`oneVPL` directly to support Intel Quick Sync on a larger number of systems.
The nixpkgs-unstable channel's programs.sqlite was used to identify
packages producing exactly one binary, and these automatically added
to their package definitions wherever possible.
checkInputs used to be added to nativeBuildInputs. Now we have
nativeCheckInputs to do that instead. Doing this treewide change allows
to keep hashes identical to before the introduction of
nativeCheckInputs.
continuation of #109595
pkgconfig was aliased in 2018, however, it remained in
all-packages.nix due to its wide usage. This cleans
up the remaining references to pkgs.pkgsconfig and
moves the entry to aliases.nix.
python3Packages.pkgconfig remained unchanged because
it's the canonical name of the upstream package
on pypi.
