This means the perfetto UI will have a non-zero/NULL handle/name in the UI on these renderstages. Unfortunately, intel/ds is outside of vulkan so unless we pull in anv headers, we can't just pass in the anv_cmd_buffer. This also means it would be much more painful to pass the cmd buffer to the rest of the events, so they'll still have unset command buffers. Still, being able to see the name of the command buffer in at least one of the events should be useful once that's glued together. Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22350>