[Refactor] Remove internal stage_configs_path plumbing (#5741)

Signed-off-by: zwhzzz0821 <2831474076@qq.com>
Signed-off-by: Hongsheng Liu <liuhongsheng4@huawei.com>
Co-authored-by: Hongsheng Liu <liuhongsheng4@huawei.com>

tests/engine/test_async_omni_engine_abort.py

@@ -68,7 +68,7 @@ async def test_abort():
     with ExitStack() as after:
         engine = AsyncOmni(
             model=model,
-            stage_configs_path=stage_config,
+            deploy_config=stage_config,
         )
         after.callback(engine.shutdown)