[Aclgraph][DP] Fix dp dummy run not in aclgraph error (#3208)

### What this PR does / why we need it?
When running DP in a non-equilibrium scenario, which means there is some
dp groups executing `dummy_run`, we need to make sure it running the
same mode as other dp, thus improving then performance in dp scenario

### How was this patch tested?
Tested by adding log in `_dummy_run`

- vLLM version: v0.10.2
- vLLM main:
https://github.com/vllm-project/vllm/commit/releases/v0.11.0

---------

Signed-off-by: MengqingCao <cmq0113@163.com>

tests/ut/worker/test_worker_v1.py

@@ -444,6 +444,8 @@ class TestNPUWorker(TestBase):
         # Create worker mock
         with patch.object(NPUWorker, "__init__", lambda x, **kwargs: None):
             worker = NPUWorker()
+            worker.compilation_config = MagicMock()
+            worker.compilation_config.cudagraph_mode = MagicMock()
             mock_model_runner = MagicMock()
             worker.model_runner = mock_model_runner
 
@@ -451,7 +453,8 @@ class TestNPUWorker(TestBase):
             worker.execute_dummy_batch()
 
             # Verify call
-            mock_model_runner._dummy_run.assert_called_once_with(1)
+            mock_model_runner._dummy_run.assert_called_once_with(
+                num_tokens=1, uniform_decode=True, force_attention=False)
 
     @patch("vllm_ascend.worker.worker_v1.envs_vllm")
     @patch("vllm_ascend.worker.worker_v1.logger")