desktops: move mesa/GPU runtime + diagnostics to common mid tier

Ports armbian/build extensions/mesa-vpu.sh's 3D package list into
configng so every mid-tier desktop install (image-build or runtime
armbian-config invocation) gets the same GPU runtime + diagnostics,
not just the ones that go through the mesa-vpu extension.

9 packages added to common.yaml mid tier:

  libgl1-mesa-dri       Mesa DRI drivers (hardware OpenGL path)
  libglx-mesa0          Mesa GLX front-end for X11
  mesa-utils            glxinfo / glxgears / es2_info
  mesa-vulkan-drivers   Vulkan ICDs (Panfrost, Lima, Radeon, Intel, …)
  vulkan-tools          vulkaninfo / vkcube
  glmark2-wayland       GL bench (Wayland backend)
  glmark2-es2-wayland   GLES2 bench (Wayland backend)
  glmark2-x11           GL bench (X11 backend)
  glmark2-es2-x11       GLES2 bench (X11 backend)

Three entries from mesa-vpu.sh's original list were dropped:

  mesa-utils-extra   — doesn't exist in any Debian/Ubuntu archive
                       (dropped upstream some years ago)
  glmark2            — not a binary package, only a source package
                       (the -{wayland,x11,es2-*} flavours are the real debs)
  glmark2-es2        — same, no binary package ships under that name

mesa-vpu has been silently apt-warning on these for years. Dropping
them on the move is the clean way to fix the phantoms.

Availability verified via Packages.gz fetches from
ftp.debian.org + archive.ubuntu.com / ports.ubuntu.com:
all 9 present on amd64/arm64/armhf/riscv64 for trixie and noble,
and on amd64/arm64/armhf for bookworm (riscv64 not applicable there).
No tier_override needed; the list holds across the matrix.

Pairs with a build-side mesa-vpu trim that removes the same
packages from extensions/mesa-vpu.sh's post_install_kernel_debs__3d.
With both landed, mesa-vpu shrinks to its genuinely
board-framework-only responsibilities (rockchip-multimedia PPA
+ codecs, KDE Neon base-files hold, libdav1d7 hold, dist-upgrade).

Author: igorpecovnik

tools/modules/desktops/yaml/common.yaml

@@ -60,6 +60,27 @@ tiers:
       - cups-pk-helper       # polkit bridge — lets GNOME/KDE printer panels
                              # unlock cups config without sudo. Other DEs
                              # get this transitively via system-config-printer.
+      # 3D / GPU runtime + diagnostics. Previously installed by
+      # armbian/build's extensions/mesa-vpu.sh on desktop builds;
+      # moved here so every mid-tier desktop install (image-built
+      # or runtime armbian-config invocation) gets the same set.
+      # Mesa runtime + Vulkan drivers give GL/Vulkan-capable DEs a
+      # hardware path instead of llvmpipe; mesa-utils + vulkan-tools
+      # are the canonical probing surface; glmark2-* are the
+      # GL/GLES bench binaries (no plain 'glmark2' / 'glmark2-es2'
+      # package exists — Debian only ships the window-system-
+      # specific variants).
+      # Verified present on Debian bookworm/trixie/forky/sid and
+      # Ubuntu jammy/noble/resolute across amd64/arm64/armhf/riscv64.
+      - libgl1-mesa-dri       # Mesa DRI drivers (OpenGL hardware path)
+      - libglx-mesa0          # Mesa GLX front-end for X11
+      - mesa-utils            # glxinfo, glxgears, es2_info, etc.
+      - mesa-vulkan-drivers   # Vulkan ICD drivers (Panfrost, Lima, Radeon, Intel, …)
+      - vulkan-tools          # vulkaninfo, vkcube
+      - glmark2-wayland       # GL benchmark — Wayland backend
+      - glmark2-es2-wayland   # GLES2 benchmark — Wayland backend
+      - glmark2-x11           # GL benchmark — X11 backend
+      - glmark2-es2-x11       # GLES2 benchmark — X11 backend
 
   full:
     packages: