Introduce api/implementation configuration support

Since we need to do some major work to keep track of declared configurations and then replace code with the proper configuration, we decided to just show warnings for now.

This work includes finding dependency information for non resolvable configurations so we look into the parents

If gradle/gradle#11106 lands some day, we could definitely enhance this experience.

While it is great to have automatic fix, not having it is worse. So for now warning about this with the same detail as before is much better than a broken experience with new Gradle configurations

Because of this, we consider the change as a breaking one.