doc: replace deprecated Vulkan options with RADV

Remove obsolete --vulkan=amdvlk, --vulkan=pro, and --vulkan=amdvlk,pro options. Replace with --vulkan=radv as the only supported Vulkan implementation.

Related:

• OSGSUP-865
• Gerrit: http://gerrit-git.amd.com/c/brahma/ec/packaging/doc/+/1341994