graphics/mesa-devel: update to 24.0.b.1666
- Intel drivers can no longer be built without LLVM after https://gitlab.freedesktop.org/mesa/mesa/-/commit/b52e25d3a8ee
- Enable Vulkan Raytracing for Intel as it also uses LLVM
Changes: https://gitlab.freedesktop.org/mesa/mesa/-/compare/04d26ceb0a8...219be558076