refactor(mge/distributed): change bcast_params_ to bcast_list_

GitOrigin-RevId: 26b452a6b763c7eac621e00524198db6a3b558c1

imperative/python/megengine/distributed/__init__.py

@@ -19,7 +19,7 @@ from .group import (
     is_distributed,
     new_group,
 )
-from .helper import bcast_params_, make_allreduce_cb, synchronized
+from .helper import bcast_list_, make_allreduce_cb, synchronized
 from .launcher import launcher
 from .server import Client, Server
 from .util import get_free_ports

imperative/python/megengine/distributed/helper.py

@@ -67,7 +67,7 @@ def get_device_count_by_fork(device_type: str):
     return q.get()
 
 
-def bcast_params_(params, group):
+def bcast_list_(params, group):
     for p in params:
         p._reset(broadcast(p, group))