In create_rt_shader, we were setting group_idx to the stage index before.
Fixes the following tests:
dEQP-VK.ray_query.builtin.instancecustomindex.miss.aabbs
dEQP-VK.ray_query.builtin.objectrayorigin.miss.triangles
Fixes: c39ccce ("radv/rt: use stage ID as handle for general and closestHit shaders")
Signed-off-by: Konstantin Seurer <konstantin.seurer@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17936>