[Refactor] Remove legacy --stage-configs-path from the serve CLI (#5647)

Signed-off-by: zwhzzz0821 <2831474076@qq.com>

tests/e2e/accuracy/helpers.py

@@ -696,7 +696,7 @@ def _dreamzero_omni_server_from_params(params):
 
     server_args = list(params.server_args or [])
     if params.stage_config_path is not None:
-        server_args += ["--stage-configs-path", params.stage_config_path]
+        server_args += ["--deploy-config", params.stage_config_path]
     return OmniServer(
         params.model,
         server_args,