### What this PR does / why we need it? 1.Add eplb ci to check the change of eplb feature. 2.Add param checking of eplb params. ### Does this PR introduce _any_ user-facing change? ### How was this patch tested? Qwen in A3. - vLLM version: v0.11.0rc3 - vLLM main: https://github.com/vllm-project/vllm/commit/v0.11.0 --------- Signed-off-by: offline0806 <3337230449@qq.com> Co-authored-by: offline0806 <3337230449@qq.com>