radv/rt: Clear NIR metadata after lowering the ABI

radv_nir_lower_rt_abi inserts instructions and control flow.

Reviewed-by: Friedrich Vock <friedrich.vock@gmx.de>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23545>

src/amd/vulkan/radv_rt_shader.c

@@ -1732,6 +1732,8 @@ radv_nir_lower_rt_abi(nir_shader *shader, const VkRayTracingPipelineCreateInfoKH
                     nir_load_var(&b, vars.geometry_id_and_flags));
    ac_nir_store_arg(&b, &args->ac, args->ac.rt.hit_kind, nir_load_var(&b, vars.hit_kind));
 
+   nir_metadata_preserve(impl, nir_metadata_none);
+
    /* cleanup passes */
    NIR_PASS_V(shader, nir_lower_global_vars_to_local);
    NIR_PASS_V(shader, nir_lower_vars_to_ssa);