anv,intel/compiler: implement more builtins for Mesh Shading pipeline
On top of !13662 (merged).
Implements:
- gl_MeshPrimitivesNV[].gl_ViewportIndex
- gl_MeshPrimitivesNV[].gl_PrimitiveId
- gl_MeshPrimitivesNV[].gl_Layer
- gl_MeshPrimitivesNV[].gl_ViewportMask
Reviewed patches merged via !15303 (merged) and !16493 (merged).
Edited by Marcin Ślusarz