[Perf] Update causal conv1d fn for better perf#4759

SunnyLee151064 wants to merge 3 commits intovllm-project:mainvllm-project/vllm-ascend:mainfrom

SunnyLee151064:update_causal_conv1d_fnSunnyLee151064/vllm-ascend:update_causal_conv1d_fnCopy head branch name to clipboard