[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/compile/piecewise/test_multiple_graphs.py

@@ -20,7 +20,7 @@ from vllm.config import (
     set_current_vllm_config,
 )
 from vllm.forward_context import BatchDescriptor, set_forward_context
-from vllm.utils import is_torch_equal_or_newer
+from vllm.utils.torch_utils import is_torch_equal_or_newer
 
 # This import automatically registers `torch.ops.silly.attention`
 from .. import silly_attention  # noqa: F401