[CI] Upgrade trasnformers version (#6307)

Upgrade transformers to >=4.56.4

- vLLM version: v0.14.1
- vLLM main:
dc917cceb8

Signed-off-by: wangxiyuan <wangxiyuan1007@gmail.com>

tests/e2e/singlecard/test_aclgraph_mem.py

@@ -21,7 +21,6 @@ from unittest.mock import patch
 
 import pytest
 import torch
-from modelscope import snapshot_download  # type: ignore
 from vllm import SamplingParams
 
 from tests.e2e.conftest import VllmRunner
@@ -66,11 +65,11 @@ def test_aclgraph_mem_use(model: str, max_tokens: int) -> None:
         sampling_params = SamplingParams(max_tokens=max_tokens,
                                          temperature=0.0)
         if model == "vllm-ascend/DeepSeek-V2-Lite-W8A8":
-            vllm_model = VllmRunner(snapshot_download(model),
+            vllm_model = VllmRunner(model,
                                     max_model_len=1024,
                                     quantization="ascend")
         else:
-            vllm_model = VllmRunner(snapshot_download(model))
+            vllm_model = VllmRunner(model)
         _ = vllm_model.generate(prompts, sampling_params)
 
     assert capture_called.value == 1, "capture_model was not called during test"