[SPARK-34995] Port/integrate Koalas remaining codes into PySpark#32197

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itholic:SPARK-34995-fix

Commits on Apr 14, 2021

[SPARK-34495] Port/integrate Koalas remaining codes into PySpark
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Commits on Apr 15, 2021

Merge branch 'master' of https://github.com/apache/spark into SPARK-34995
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Commits on Apr 16, 2021