Remove value tuples from TransformsCatalog methods

[yaeldekel]

Many of the methods in TransformsCatalog create estimators using a params array of (string outputColumnName, string inputColumnName). As mentioned in #2501, we should change all these to not use value tuples.

[Ivanidzo4ka]

What would be your solution?
Do you plan to introduce ColumnInfoBase class (or some other name) and derive all other ColumnInfo from it?

[yaeldekel]

I would rather add a SimpleColumnInfo class (or some other name), so estimators that don't have a ColumnInfo class (for instance, ColumnCopyingEstimator) can use it. Does this make sense?