gnu: libxml2: Update to 2.14.6; deprecate python-libxml2.

Python bindings for libxml2 are now built as part of libxml2; remove all
python-libxml2 inputs for libxml2 (nearly all already had libxml2) and
deprecate the package.  This was done manually using

git grep python-libxml2 gnu/packages

to find affected packages and then check all their input fields.

With the update to libxml2, we can remove all the libxml2-next* variants.
This change was automated with:

git grep -rl libxml2-next | xargs sed -i 's/\(libxml2-next\|libxml2-next-for-grafting\)/libxml2/g'

* gnu/packages/xml.scm (libxml2): Update to 2.14.6.
[arguments]<#:phases>: Add configure-python phase (from python-libxml2).
[native-inputs]: Add pkg-config and python-minimal.
(libxml2-next, libxml2-next/fixed, libxml2-next-for-grafting): Remove.
(python-libxml2): Deprecate in favor of libxml2.

Change-Id: I2976f2fde086e9bc345d661edbdc125abbb7a753

gnu: rest: Ungraft.

* gnu/packages/gnome.scm (rest)[replacement]: Remove.
[propagated-inputs]: Replace libxml2 with libxml2-next-for-grafting.
(rest/fixed): Remove.

Change-Id: Ib203ef0697419558c0be0ba2e844293aa20a6061

gnu: gtk+: Ungraft.

* gnu/packages/gtk.scm (gtk+): Update to 3.24.43.
[replacement]: Remove.
[source]: Use git-fetch.
[arguments]<#:phases>: Add some test to disable-failing-tests phase.
(gtk+/fixed): Remove.

Change-Id: Ia34ac538f36424748e0a813cfc4e0dad2d643d0b

gnu: wget: Ungraft.

* gnu/packages/wget.scm (wget): Update to 1.25.0.
[replacement]: Remove.
(wget/fixed): Remove.

Change-Id: Ib3798d67bc293295a0480e2db36de98e1ce7edea

gnu: pixman: Update to 0.46.4.

Upstream no longer uses autotools so we build with meon-build-system now.  The
configure flag to not build a static output is no longer supported and even
though it was used previously, there was still a static library built.
Finally, the gnuplot configure flag is also removed, per
<https://issues.guix.gnu.org/69962>.

* gnu/packages/xdisorg.scm (pixman): Update to 0.46.4.
[build-system]: Switch to meson-build-system.
[arguments]<#:configure-flags>: Rewrite with gexp and for meson.  Remove
"--disable-static" as it is not a supported flag.  Remove "--enable-gnuplot"
flag.
[inputs, native-inputs]: Remove.
[home-page]: Use https URL.

Change-Id: I6bc17761ce96de9ef17bb8b420b8570d1ea11e07

gnu: ffmpeg: Update to 8.0.

* gnu/packages/video.scm (ffmpeg-7): Replace with...
(ffmpeg): ... this updated version.
(ffmpeg): Adjust to use ffmpeg.
(ffmpeg-jami): Stay on ffmpeg-6.
* gnu/packages/tor-browsers.scm (make-torbrowser): Likewise.
* gnu/packages/python-xyz.scm (python-av): Likewise.
* gnu/packages/qt.scm (qtmultimedia): Likewise.

Change-Id: I2d7b1861a647f583da93fe230fd0734742671d4d

gnu: mesa: Update to 25.2.2.

* gnu/packages/gl.scm (mesa): Update to 25.2.2.

Change-Id: Iad91783d151000f6a7e43ce5d59f4b9b38aedc45

gnu: spirv-llvm-translator: Update to 18.1.10.

* gnu/packages/vulkan.scm (spirv-llvm-translator): Update to 18.1.10.
[native-inputs]: Add libffi, pkg-config.

Change-Id: Id7251c3594ae56533b0930f9ecd54d8db88b5ab6
Signed-off-by: Maxim Cournoyer <maxim@guixotic.coop>

gnu: vulkan-memory-allocator: Update to 3.3.0.

* gnu/packages/vulkan.scm (vulkan-memory-allocator)[arguments]: Use
G-Expressions.

Change-Id: I17030138801cb6d1b17cb849275dc0a0269daf4d
Signed-off-by: Maxim Cournoyer <maxim@guixotic.coop>

gnu: vkd3d: Improve style.

* gnu/packages/vulkan.scm (vkd3d)[arguments]: Use G-Expressions.
[native-inputs]: Modernize.

Change-Id: I29d558f777f3bd56e55e8e5872ca7fa291081b0d
Signed-off-by: Maxim Cournoyer <maxim@guixotic.coop>

gnu: vulkan: Update to 1.4.321.0.

* gnu/packages/vulkan.scm (spirv-headers, spirv-tools, spirv-cross,
glslang, vulkan-headers, vulkan-loader, vulkan-tools,
vulkan-validationlayers, vulkan-utility-libraries): Update to 1.4.321.0.

Change-Id: Ia19d8cdec3c3a904326d869a58c6348d4f5c5215
Signed-off-by: Maxim Cournoyer <maxim@guixotic.coop>

gnu: shaderc: Improve style.

* gnu/packages/vulkan.scm (shaderc)[arguments]: Use G-Expressions.

Change-Id: Ifa7b303c173a5093fa7733fa67e09eab1b39d8bd
Signed-off-by: Maxim Cournoyer <maxim@guixotic.coop>

gnu: vulkan-tools: Improve style.

* gnu/packages/vulkan.scm (vulkan-tools): Fix max column.

Change-Id: Ibae23e8eaed1fa6c3f0ea593b4c64330e4037a94
Signed-off-by: Maxim Cournoyer <maxim@guixotic.coop>

gnu: vulkan-validationlayers: Improve style.

* gnu/packages/vulkan.scm (vulkan-validationlayers): Fix max column.

Change-Id: I3a79acbc7c4a36105e27a6dfaba028094a5d5232
Signed-off-by: Maxim Cournoyer <maxim@guixotic.coop>

gnu: vulkan-loader: Improve style.

* gnu/packages/vulkan.scm (vulkan-loader): Fix max column.

Change-Id: I613ef9c8b87200168af3ab4c0379b0c8b2d09c58
Signed-off-by: Maxim Cournoyer <maxim@guixotic.coop>

gnu: glslang: Improve style.

* gnu/packages/vulkan.scm (glslang)[arguments]: Use Gexp.
[native-inputs]: Remove python; add python-minimal.

Change-Id: I7b4f236b984b85d12f76f9d8de2b627e005bd232
Signed-off-by: Maxim Cournoyer <maxim@guixotic.coop>

gnu: spirv-cross: Improve style.

* gnu/packages/vulkan.scm (spirv-cross)[arguments]: Use Gexp.
[native-inputs]: Remove python; add python-minimal.

Change-Id: Ia010d51736d099e4a0f983b79e2053bff6a63637
Signed-off-by: Maxim Cournoyer <maxim@guixotic.coop>

gnu: spirv-tools: Improve style.

* gnu/packages/vulkan.scm (spirv-tools):[arguments]: Use Gexp.
[native-inputs]: Remove python; add python-minimal.

Change-Id: I91c66e8b196a00f9beb327e440f39d2675964f99
Signed-off-by: Maxim Cournoyer <maxim@guixotic.coop>

gnu: mesa: Update to 25.2.1.

* gnu/packages/gl.scm (mesa): Update to 25.2.1.

Change-Id: I4ee0255e6208b282ccca139c56e051a08170e026

gnu: ffmpeg@4: Fix build.

* gnu/packages/video.scm (ffmpeg-4)[arguments]: Add modules.
<#:configure-flags>: Remove flags --enable-libplacebo and --enable-libshaderc.

Change-Id: Ib3b69703f74601b1b632dd7f673c0235f1fb6c79