Intel media stack: update libva 2.23.0, media-driver 26.2.1

[Rutpiv]

Testing the changes

• I tested the changes in this PR: briefly

Local build testing

• I built this PR locally for my native architecture (x86_64)
• I built this PR locally for these architectures using specific masterdirs:
  • x86_64-musl
  • i686
• I built this PR locally for these architectures (crossbuilds):
  • aarch64
  • aarch64-musl
  • armv7l
  • armv7l-musl
  • armv6l
  • armv6l-musl

[Rutpiv]

This PR is still a draft while I validate the changes and check if any further adjustments are needed. Any feedback or suggestions are welcome.

[Rutpiv]

Updates the Intel media stack.

Version bumps:

• libva, libva-glx, libva-utils 2.23.0
• intel-gmmlib 22.10.0
• intel-media-driver 26.2.1
• vpl-gpu-rt 26.2.1
• igt-gpu-tools 2.4

General notes:

• subpackage depends switched from exact ${sourcepkg}-${version}_${revision} to >= across libva-glx, intel-gmmlib and intel-media-driver.
• homepage/changelog URLs refreshed and update files added/normalized to the info/refs pattern.
• SONAME unchanged across the stack, no reverse-dep rebuilds needed.

Low-level updates originally bundled here (libdrm, libpciaccess, elfutils, libunwind) were split into separate PRs to keep this one scoped to the media stack; this builds against their repo versions.

---

@zlice - libvpl, vpl-gpu-rt

• libvpl: no version change; drops -DBUILD_EXAMPLES configure_arg, removes a stale commented-out vmove, refreshes short_desc/changelog (master -> main), adds an update file.
• vpl-gpu-rt: adds libmfx-gen.so.1.2 to common/shlibs and moves the unversioned .so to -devel.

@icp1994 - libva-utils

• dropped explicit -Ddrm/-Dx11/-Dwayland configure_args, relying on auto-detection.

@the-maldridge - oneVPL

• a question on the oneVPL removal here: oneVPL is a transitional dummy package forwarding to libvpl-devel/libvpl-examples since the rename. I included its removal in this PR (added to removed-packages), but I'm not sure what the convention is — do transitional dummies eventually get removed once everyone has migrated, or do they stay in the repo indefinitely as a safety net? Happy to drop the removal commit if it is not necessary.

orphaned (no maintainer to cc): libva, libva-glx, intel-gmmlib, intel-media-driver, igt-gpu-tools

• libva-glx: dropped -Dwith_wayland and wayland-devel since only the glx component is kept; also moves va_backend_glx.h alongside va_glx.h.
• igt-gpu-tools: adds pciutils-devel; musl patch slimmed to the single hunk still needed (intel_gpu_frequency.c limits.h), the rest is fixed upstream in 2.4.

[icp1994]

✔️ for the libva-utils changes

[Rutpiv]

Applied ($|(?=^)) to all update patterns. Bumped intel-media-driver and vpl-gpu-rt to 26.2.2. No other changes.