TDFC cleanup follow up

[Jmlundeen]

This is some additional cleanup for the transforming double faced card rework.

• remove secondSideCardClazz used by old transforming cards
• remove TransformAbility since not needed anymore
• cleanup TODO items
  • moved VALUE_KEY_ENTER_TRANSFORMED to TransformingDoubleFacedCard
  • removed transform validation in Player.moveCards and kept in ZonesHandler. Doesn't seem necessary to have redundant check.
  • removed old transform card check from Mycosynth Lattice and Painter's Servant
  • removed old transform related code from PermanantCard init
  • remove ignoreTransformEffect flag from SpellTransformedAbility (temporary flag to separate from old transform implementation)
  • remove instanceof DoubleFacedCardHalf check from CardImpl copy constructor; DFC will still use the field, instance check is currently just to differentiate between old Transforming logic

part of #14099