[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_models.py

@@ -20,7 +20,6 @@
 import os
 
 import pytest
-from modelscope import snapshot_download  # type: ignore
 from vllm import SamplingParams
 from vllm.assets.audio import AudioAsset
 
@@ -46,7 +45,7 @@ def test_minicpm(model) -> None:
     ]
     max_tokens = 5
 
-    with VllmRunner(snapshot_download(model),
+    with VllmRunner(model,
                     max_model_len=512,
                     gpu_memory_utilization=0.7) as runner:
         runner.generate_greedy(example_prompts, max_tokens)
@@ -61,7 +60,7 @@ def test_whisper(model) -> None:
                                      max_tokens=10,
                                      stop_token_ids=None)
 
-    with VllmRunner(snapshot_download(model),
+    with VllmRunner(model,
                     max_model_len=448,
                     max_num_seqs=5,
                     dtype="bfloat16",