Tests for declaration mappings dumping from compiler

compiler/testData/codegen/dumpDeclarations/classes.kt

@@ -0,0 +1,58 @@
+public class PublicClass {
+
+    companion object {}
+
+    public object ObjPublic
+    internal object ObjInternal
+    protected object ObjProtected
+    private object ObjPrivate
+
+    public class NestedPublic
+    internal class NestedInternal
+    protected class NestedProtected
+    private  class NestedPrivate
+
+    public inner class InnerPublic
+    internal inner class InnerInternal
+    protected inner class InnerProtected
+    private inner class InnerPrivate
+}
+
+internal class InternalClass {
+    companion object {}
+}
+
+internal class InternalClassInternalCompanion {
+    internal companion object {}
+}
+
+internal class InternalClassPrivateCompanion {
+    private companion object {}
+}
+
+private class PrivateClass {
+    companion object {}
+
+    public object ObjPublic
+    internal object ObjInternal
+    protected object ObjProtected
+    private object ObjPrivate
+
+    public class NestedPublic
+    internal class NestedInternal
+    protected class NestedProtected
+    private  class NestedPrivate
+
+    public inner class InnerPublic
+    internal inner class InnerInternal
+    protected inner class InnerProtected
+    private inner class InnerPrivate
+}
+
+private class PrivateClassInternalCompanion {
+    internal companion object
+}
+private class PrivateClassPrivateCompanion {
+    private companion object
+}
+