Add proto comparison tests with changes of class/member flags

Original commit: 58a91b3d20

jps/jps-plugin/testData/comparison/classSignatureChange/classFlagsChanged/new.kt

@@ -1,6 +1,55 @@
 package test
 
-import kotlin.annotation.*
+abstract class AbstractFlagAdded
+class AbstractFlagRemoved
+abstract class AbstractFlagUnchanged
 
-open class ClassWithFlagsChanged {
+annotation class AnnotationFlagAdded
+class AnnotationFlagRemoved
+annotation class AnnotationFlagUnchanged
+
+data class DataFlagAdded(val x: Int)
+class DataFlagRemoved(val x: Int)
+data class DataFlagUnchanged(val x: Int)
+
+enum class EnumFlagAdded
+class EnumFlagRemoved
+enum class EnumFlagUnchanged
+
+final class FinalFlagAdded
+class FinalFlagRemoved
+final class FinalFlagUnchanged
+
+class InnerClassHolder {
+    inner class InnerFlagAdded
+    class InnerFlagRemoved
+    inner class InnerFlagUnchanged
 }
+
+internal class InternalFlagAdded
+class InternalFlagRemoved
+internal class InternalFlagUnchanged
+
+open class OpenFlagAdded
+class OpenFlagRemoved
+open class OpenFlagUnchanged
+
+private class PrivateFlagAdded
+class PrivateFlagRemoved
+private class PrivateFlagUnchanged
+
+class ProtectedClassHolder {
+    protected class ProtectedFlagAdded
+    class ProtectedFlagRemoved
+    protected class ProtectedFlagUnchanged
+}
+
+public class PublicFlagAdded
+class PublicFlagRemoved
+public class PublicFlagUnchanged
+
+sealed class SealedFlagAdded
+class SealedFlagRemoved
+sealed class SealedFlagUnchanged
+
+class UnchangedNoFlags