[MoE] Tune Fused MoE for R1 on NVIDIA_L20

[DefTruth]

5%~8% improved for decode throughputs on L20 with pp3+tp8, this config is generated by:

python3 benchmark_moe.py \
        --model /workspace/DeepSeek-R1 \
        --trust-remote-code \
        --dtype fp8_w8a8 \
        --tp-size 8 \
        --tune

[github-actions]

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[DefTruth]

closed, reopen at #15322 as more completed one.