Stuff COMPUTE_WALKER_BODY in COMPUTER_WALKER in both iris and anv. This also fixes the tracepoint for ray dispatches. Stuffing COMPUTE_WALKER_BODY allow us to set the cmd_buffer->state.last_compute_walker. Signed-off-by: Sagar Ghuge <sagar.ghuge@intel.com> Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31822>