change Vector to std::vector and provide MixVector class as a helper … (#39559)
* change Vector to std::vector and provide MixVector class as a helper wrapper class * solve the multi-gpu hang problem * remove the duplicate template instantialize * Copy vector to cpu * add CopyToCPU * xxx * final version: fix the problem of all reduce * remove mixvector dependence * fix * merge * fix code * fix by CI
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