[5/N] MoE Refactor: Update MoE parallelism arguments (#8658)

test/srt/test_eplb.py

@@ -34,7 +34,8 @@ class _BaseTestDynamicEPLB(CustomTestCase):
                 "--dp",
                 "2",
                 "--enable-dp-attention",
-                "--enable-deepep-moe",
+                "--moe-a2a-backend",
+                "deepep",
                 "--deepep-mode",
                 "normal",
                 "--disable-cuda-graph",
@@ -96,8 +97,7 @@ class TestStaticEPLB(CustomTestCase):
                 trust_remote_code=True,
                 ep_num_redundant_experts=4,
                 enable_dp_attention=True,
-                enable_deepep_moe=True,
-                deepep_mode="normal",
+                moe_a2a_backend="deepep",
                 disable_cuda_graph=True,
                 expert_distribution_recorder_mode="stat",
                 tp_size=2,