ValidateCSV - get all constraint violations for an invalid line

Right now the ValidateCSV will invalidate a line as soon as a column is violating the specified constraint and will go the next one. It means that for an invalid line, we'll only know about the first violation but the line may be invalid for many columns.

It'd be nice to have the option to get all of the violations for a given line. This should be optional, and false by default, as this would impact the performances of the processing.