Implements `mars.tensor.stats.ks_2samp`#2324

Merged

hekaisheng merged 4 commits intomars-project:masterfrom qinxuye:feature/ks_2samp

Aug 11, 2021

+767-144

Commits on Aug 11, 2021

Implement mars.tensor.stats.ks_2samp
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Add documents
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Fix progress bar & codacy
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Try to increase coverage
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