### What this PR does / why we need it?
RFC: https://github.com/vllm-project/vllm/issues/30055
### How was this patch tested?
1. enable flashcommon1
export VLLM_ASCEND_ENABLE_FLASHCOMM1=1
2. enable sfa-cp
--additional-config '{ "enable_sfa_cp": true }' \
- vLLM version: v0.12.0
- vLLM main:
ad32e3e19c
Signed-off-by: AlvisGong <gwly0401@163.com>
Co-authored-by: clrs97 <524936896@qq.com>
Co-authored-by: zzhx1 <zzh_201018@outlook.com>
Co-authored-by: hwhaokun <haokun0405@163.com>
Co-authored-by: wangxiyuan <wangxiyuan1007@gmail.com>