Enhance redactOptions to accept any Map type

In ParsedStatement.productIterator, `case mapArg: Map[_, _]` may match any Map type, thus causing `asInstanceOf[Map[String, String]]` to throw ClassCastException.

The following test reproduces the issue:

case class TestStatement(p: Map[String, Int]) extends ParsedStatement {
 override def output: Seq[Attribute] = Nil
 override def children: Seq[LogicalPlan] = Nil
}

TestStatement(Map("abc" -> 1)).toString

Changing the code to `case mapArg: Map[String, String]` will not work due to type erasure. As a matter of fact, compiler gives this warning:

Warning:(41, 18) non-variable type argument String in type pattern scala.collection.immutable.Map[String,String] (the underlying of Map[String,String]) is unchecked since it is eliminated by erasure
case mapArg: Map[String, String] =>