Enabled StackDepthExceptionSpec.scala under Scala 3 build.
Enabled StackDepthExceptionSpec.scala under Scala 3 build.

cheeseng/scalatest,scalatest/scalatest,dotty-staging/scalatest,scalatest/scalatest,dotty-staging/scalatest,cheeseng/scalatest,cheeseng/scalatest,scalatest/scalatest,dotty-staging/scalatest