message: Inline span creation in some async instrumentation
diff: @@ -453,9 +453,8 @@ where
  let (reactor, initial_effects) = R::new(cfg, registry, event_queue, rng)?;
  // Run all effects from component instantiation.
  - let span = debug_span!("process initial effects");
  process_effects(scheduler, initial_effects)
  - .instrument(span)
  + .instrument(debug_span!("process initial effects"))
  .await;
  info!("reactor main loop is ready");
  @@ -485,9 +484,11 @@ where
  let effects = create_effects(effect_builder);
  - let effect_span = debug_span!("process injected effects", ev = self.event_count);
  process_effects(self.scheduler, effects)
  - .instrument(effect_span)
  + .instrument(debug_span!(
  + "process injected effects",
  + ev = self.event_count
  + ))
  .await;
  }
  