[Chore] Clean up pytorch helper functions in vllm.utils (#26908)

Signed-off-by: Isotr0py <mozf@mail2.sysu.edu.cn>
Signed-off-by: isotr0py <2037008807@qq.com>

tests/distributed/test_sequence_parallel.py

@@ -18,7 +18,7 @@ import pytest
 from vllm.config.compilation import CompilationMode
 from vllm.config.model import RunnerOption
 from vllm.logger import init_logger
-from vllm.utils import is_torch_equal_or_newer
+from vllm.utils.torch_utils import is_torch_equal_or_newer
 
 from ..models.registry import HF_EXAMPLE_MODELS
 from ..utils import compare_two_settings, create_new_process_for_each_test