039baf95fc
After previous commits IrActualizer runs only there are at least two modules in backend input. So to check diagnostics from Actualizer all tests should contain at least two modules Diagnostics in test `extendExpectedClassWithAbstractMember.kt` were changed because there is an exception from IrActualizer caused by errors from frontend (`ABSTRACT_METHOD_NOT_IMPLEMENTED`), which is swallowed by this kind of tests