RFC: https://github.com/vllm-project/vllm-ascend/issues/4629 Reason: Eliminate duplicate code for two file(mla_cp.py attention_cp.py) to common_cp.py. vLLM version: 0.13.0rc3 vLLM main:ad32e3e19cvLLM version: release/v0.13.0 vLLM main:5fbfa8d9ef- vLLM version: v0.13.0 - vLLM main:5326c89803--------- Signed-off-by: wujinyuan1 <wjy9595@qq.com> Signed-off-by: wujinyuan1 <wujinyuan1@huawei.com> Co-authored-by: wujinyuan1 <wjy9595@qq.com>