Expose constraint hints in check results

[katzp]

I'm taking check results/metrics and sending them to slack as well as snowflake. Would love to include the constraint hints as sometimes this will be much easier to read than the Constraint result message/constraint.

Think this could be more easily accessed if the Check case class didn't put constraints as private. For example:

case class Check(
  level: CheckLevel.Value,
  description: String,
  constraints: Seq[Constraint] = Seq.empty) // changed from private[deequ] val constraints: Seq[Constraint] = Seq.empty)

[aviatesk]

#339 will help this ?

[katzp]

Yes this pr will do what I want. Thanks