add spec decode e2e UT && replace logger mode

Signed-off-by: mengwei805 <mengwei25@huawei.com>

Author: mengwei805

tests/conftest.py

@@ -17,14 +17,18 @@
 # limitations under the License.
 #
 
+import contextlib
+import gc
 from typing import List, Optional, Tuple, TypeVar, Union
 
 import numpy as np
 import pytest
+import torch
 from PIL import Image
 from vllm import LLM, SamplingParams
 from vllm.config import TaskOption
-from vllm.distributed import cleanup_dist_env_and_memory
+from vllm.distributed import (destroy_distributed_environment,
+                              destroy_model_parallel)
 from vllm.inputs import ExplicitEncoderDecoderPrompt, TextPrompt, TokensPrompt
 from vllm.logger import init_logger
 from vllm.outputs import RequestOutput
@@ -44,6 +48,15 @@
 PromptVideoInput = _PromptMultiModalInput[np.ndarray]
 
 
+def cleanup_dist_env_and_memory():
+    destroy_model_parallel()
+    destroy_distributed_environment()
+    with contextlib.suppress(AssertionError):
+        torch.distributed.destroy_process_group()
+    gc.collect()
+    torch.npu.empty_cache()
+
+
 class VllmRunner:
 
     def __init__(