tasks: add the preparing state to active state checks

cylc/flow/scheduler.py

@@ -737,6 +737,8 @@ def restart_remote_init(self):
             itask.platform['install target'] = (
                 get_install_target_from_platform(itask.platform))
             if (
+                # we don't need to remote-init for preparing tasks because
+                # they will be reset to waiting on restart
                 itask.state(*TASK_STATUSES_ACTIVE)
                 and not (
                     is_platform_with_target_in_list(

cylc/flow/task_pool.py

@@ -822,7 +822,7 @@ def reload_taskdefs(self) -> None:
                 itask.copy_to_reload_successor(new_task)
                 self._swap_out(new_task)
                 LOG.info(f"[{itask}] reloaded task definition")
-                if itask.state(*TASK_STATUSES_ACTIVE):
+                if itask.state(*TASK_STATUSES_ACTIVE, TASK_STATUS_PREPARING):
                     LOG.warning(
                         f"[{itask}] active with pre-reload settings"
                     )
@@ -898,6 +898,8 @@ def can_stop(self, stop_mode):
                 and itask.state(*TASK_STATUSES_ACTIVE)
                 and not itask.state.kill_failed
             )
+            # we don't need to check for preparing tasks because they will be
+            # reset to waiting on restart
             for itask in self.get_tasks()
         )