[FEA] Support allowUnquotedControlChars for JsonToStructs and ScanJson

[GaryShen2008]

From the Spark JSON option,

allowUnquotedControlChars: Allows JSON Strings to contain unquoted control characters (ASCII characters with value less than 32, including tab and line feed characters) or not.

This is off by default with Spark, but on by default with CUDF, so we need to have a way to fix this or we will not return nulls when we should.

[revans2]

allowUnquotedControlChars is what CUDF supports by default already. We need a way to disable it because that is what Spark has by default.

[revans2]

This depends on rapidsai/cudf#15222. It may be broken up into smaller pieces in the future, and there are a lot of things that could be validated.