[WIP][Ops] Add AscendC Custom Op for Lightning Attention#7590

ChenxiQ wants to merge 7 commits intovllm-project:mainvllm-project/vllm-ascend:mainfrom

ChenxiQ:br_ascend_c_lightning_attentionChenxiQ/vllm-ascend:br_ascend_c_lightning_attentionCopy head branch name to clipboard