Introduce PropertyDescriptor.isDelegated, write new flag to metadata

#KT-8384 In Progress

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/descriptors/IrDelegateDescriptor.kt

@@ -62,7 +62,8 @@ abstract class IrDelegateDescriptorBase(
         /* isConst = */ false,
         /* isHeader = */ false,
         /* isImpl = */ false,
-        /* isExternal = */ false
+        /* isExternal = */ false,
+        /* isDelegated = */ true
 ) {
     init {
         setOutType(delegateType)
@@ -134,4 +135,4 @@ class IrLocalDelegatedPropertyDelegateDescriptorImpl(
 
     override fun <R : Any?, D : Any?> accept(visitor: DeclarationDescriptorVisitor<R, D>, data: D): R =
             visitor.visitVariableDescriptor(this, data)
-}
+}