graphics/mesa: update to 23.1.8

While here:
- Remove some unneeded dep in gallium-vdpau
- Disable libelf from devel/elfutils (we will fallback on base libelf), PR 273803
- Always disable libunwind, if you want stacktrace you will need to compile from
upstream PR: 250306
- enable vulkan haswell driver

Co-authored-by: manu, vishwin
PR: 273703, 273803, 250306