[GR-60300] Fix -H:+PrintPointsToStatistics option and make it compatible with WP-SCCP

[graalvmbot]

This PR fixes the option -H:+PrintPointsToStatistics. On top of that, it ensures that all TypeState instances are properly registered via PointsToStats.registerTypeState (which is is nop if PrintPointsToStatistics is disabled).

PointsToStats.registerTypeState was refactored out of the constructors of Single and Multi TypeState, because when the constructors are invoked from a subclass (e.g. when creating ConstantTypeState), registerTypeState would receive a only a partially initialized object. I've instead moved registerTypeState into the places where instances of TypeState are created. Fortunately, most such places can be redirected via the factory methods in AnalysisPolicy, so the diff is quite small.