nir: sink/move inverse_ballot like moves

It's just a copy for the backends that don't lower it.

Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29502>

src/compiler/nir/nir_opt_sink.c

@@ -113,6 +113,8 @@ nir_can_move_instr(nir_instr *instr, nir_move_options options)
          return options & nir_move_load_input;
       case nir_intrinsic_load_uniform:
          return options & nir_move_load_uniform;
+      case nir_intrinsic_inverse_ballot:
+         return options & nir_move_copies;
       case nir_intrinsic_load_constant_agx:
       case nir_intrinsic_load_local_pixel_agx:
          return true;