Preserve non-input_colums in Dataset.map if input_columns are specified
#4971
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This was referenced Sep 21, 2022
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Currently, if the
input_columnslist inDataset.mapis specified, the columns not in that list are dropped after themaptransform.This makes the behavior inconsistent with
IterableDataset.map.(It seems this issue was introduced by mistake in #2246)
Fix #4858