nir/opt_sink: do not sink load_ubo_vec4 out of loops

Same reason as for load_ubo.

Fixes: d199d65c3a ("nir/nir_opt_move,sink: Include load_ubo_vec4 as a load_ubo instr.")

Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30906>

src/compiler/nir/nir_opt_sink.c

@@ -226,6 +226,7 @@ can_sink_out_of_loop(nir_intrinsic_instr *intrin)
     * by nir_lower_non_uniform_access.
     */
    return intrin->intrinsic != nir_intrinsic_load_ubo &&
+          intrin->intrinsic != nir_intrinsic_load_ubo_vec4 &&
           intrin->intrinsic != nir_intrinsic_load_ssbo;
 }