[feature] support ep for deepseek v3

[ver217]

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[xs1997zju]

@ver217 great job， 想问下，v3-671B， bf16-全量训练，这边用了几机的配置， 能训的最大长度能到几k呢?

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@ver217 great job, I would like to ask, v3-671B, bf16-full training, how many machines are used here, how many k can the maximum length of training be?