### What this PR does / why we need it?
check kv extra config & del hccl backend
- vLLM version: v0.12.0
- vLLM main:
ad32e3e19c
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Signed-off-by: liziyu <liziyu16@huawei.com>
Co-authored-by: wangxiyuan <wangxiyuan1007@gmail.com>
### What this PR does / why we need it?
fix deepseekv3.1 doc to recomand developers to use Mooncake instead of LLMDatadist
### Does this PR introduce _any_ user-facing change?
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### How was this patch tested?
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Signed-off-by: AiChiMomo <1092626063@qq.com>
