nir,ac/llvm,radv: add nir_intrinsic_load_provoking_vtx_in_prim_amd

For radeonsi which load this from arg.

Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Signed-off-by: Qiang Yu <yuq825@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19166>

src/compiler/nir/nir_divergence_analysis.c

@@ -189,6 +189,7 @@ visit_intrinsic(nir_shader *shader, nir_intrinsic_instr *instr)
    case nir_intrinsic_load_num_vertices_per_primitive_amd:
    case nir_intrinsic_load_streamout_buffer_amd:
    case nir_intrinsic_load_ordered_id_amd:
+   case nir_intrinsic_load_provoking_vtx_in_prim_amd:
       is_divergent = false;
       break;