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

tests/e2e/multicard/test_data_parallel_tp2.py

@@ -42,7 +42,7 @@ def test_data_parallel_inference(model, max_tokens):
                           stdout=subprocess.PIPE,
                           stderr=subprocess.STDOUT,
                           timeout=600)
-    output = proc.stdout.decode()
+    output = proc.stdout.decode(errors='ignore')
 
     print(output)