[Hardware] Replace `torch.cuda.empty_cache` with `torch.accelerator.empty_cache`#30681

jikunshang wants to merge 5 commits intovllm-project:mainvllm-project/vllm:mainfrom

jikunshang:kunshang/acc_empty_cachejikunshang/vllm:kunshang/acc_empty_cacheCopy head branch name to clipboard