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

vllm_ascend/utils.py

@@ -948,7 +948,7 @@ def get_flashcomm2_oproj_tp_size_and_validate_config(ascend_config,
     global_tp_size = vllm_config.parallel_config.tensor_parallel_size
 
     if not flashcomm2_enable():
-        logger.info("FLASHCOMM2 not enable.")
+        logger.debug("FLASHCOMM2 not enable.")
         return flashcomm2_oproj_tp_size
 
     logger.info(