A previous fix to the generator made the generator and checker
validation of classes which could be parcelized different. The checker
would report error in cases where the generator would not generate
anything. Align these checks, with improved code sharing, so errors are
not reported on classes which will not have parcelize components
generated.
^KT-63086 Fixed
There is one of checks left unimplemented (FirParcelizePropertyChecker.checkParcelableClassProperty)
because it requires huge commonization of detecting which type can be
serialized and which not, which is not prioritized job for now