upgrade torch npu version (#4433)

vLLM graph feature now rely on torch >=2.8. To make graph mode work, we
need upgrade torch version as well. For long term support, upgrade torch
to a newer one is good to go as well.

Related vLLM change: https://github.com/vllm-project/vllm/pull/25110


- vLLM version: v0.11.2
- vLLM main: https://github.com/vllm-project/vllm/commit/v0.11.2

pyproject.toml

@@ -18,8 +18,8 @@ requires = [
     "setuptools>=64",
     "setuptools-scm>=8",
     "transformers<=4.57.1",
-    "torch-npu==2.7.1",
-    "torch==2.7.1",
+    "torch-npu==2.8.0",
+    "torch==2.8.0",
     "torchvision",
     "wheel",
     "msgpack",