Support platform/impl modifiers for properties

Do not allow platform properties to have backing fields, initializers, be
delegated, lateinit or const, or have accessors with bodies

compiler/backend/src/org/jetbrains/kotlin/codegen/AccessorForPropertyDescriptor.java

@@ -77,7 +77,8 @@ public class AccessorForPropertyDescriptor extends PropertyDescriptorImpl implem
     ) {
         super(containingDeclaration, null, Annotations.Companion.getEMPTY(), Modality.FINAL, Visibilities.LOCAL,
               original.isVar(), Name.identifier("access$" + nameSuffix),
-              Kind.DECLARATION, SourceElement.NO_SOURCE, /* lateInit = */ false, /* isConst = */ false);
+              Kind.DECLARATION, SourceElement.NO_SOURCE, /* lateInit = */ false, /* isConst = */ false,
+              /* isPlatform = */ false, /* isImpl = */ false);
 
         this.calleeDescriptor = original;
         this.superCallTarget = superCallTarget;