[RL] provide options for whether shutdown comm group after weights cleared (#5663)

* [rl] provide options for whether shutdown comm group after weights cleared

* [fix] fix args hardcode

* [fix] change args type

* [fix] add worker process args

fastdeploy/engine/args_utils.py

@@ -268,6 +268,11 @@ class EngineArgs:
     # This optimization is enabled by default, and can be disabled by using this flag.
     """
 
+    shutdown_comm_group_if_worker_idle: bool = None
+    """
+    Whether to shutdown the comm group when the weight is cleared.
+    """
+
     engine_worker_queue_port: Optional[Union[int, str, list]] = None
     """
     Port for worker queue communication.
@@ -951,6 +956,12 @@ class EngineArgs:
             default=EngineArgs.chunked_moe_size,
             help="Chunked size of moe input.",
         )
+        parallel_group.add_argument(
+            "--shutdown-comm-group-if-worker-idle",
+            action=argparse.BooleanOptionalAction,
+            default=EngineArgs.shutdown_comm_group_if_worker_idle,
+            help="Shutdown communication group when worker is idle.",
+        )
 
         # Load group
         load_group = parser.add_argument_group("Load Configuration")