[Rebase] Rebase to vllm v0.21.0 (#3530)

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tests/distributed/omni_connectors/test_chunk_transfer_adapter.py

@@ -540,6 +540,7 @@ def test_generation_scheduler_calls_cleanup_on_finished(monkeypatch, mocker: Moc
         kv_connector_output=None,
         cudagraph_stats=None,
         req_id_to_index={"req-s1": 0},
+        routed_experts_dict=None,
     )
 
     OmniGenerationScheduler.update_from_output(scheduler, scheduler_output, model_runner_output)
@@ -625,6 +626,7 @@ def test_ar_scheduler_defers_cleanup_and_queues_save_on_finished(mocker: MockerF
         cudagraph_stats=None,
         req_id_to_index={"req-ar": 0},
         kv_extracted_req_ids=None,
+        routed_experts_dict=None,
     )
 
     OmniARScheduler.update_from_output(scheduler, scheduler_output, model_runner_output)