[IR] Allow different origins in Ir[Function|Property]WithLateBinding

^KT-53663

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/impl/IrFunctionImpl.kt

@@ -116,15 +116,13 @@ class IrFunctionWithLateBindingImpl(
     isOperator: Boolean,
     isInfix: Boolean,
     isExpect: Boolean,
-    override val factory: IrFactory = IrFactoryImpl,
+    override val isFakeOverride: Boolean = origin == IrDeclarationOrigin.FAKE_OVERRIDE,
+    override val factory: IrFactory = IrFactoryImpl
 ) : IrFunctionCommonImpl(
     startOffset, endOffset, origin, name, visibility, returnType, isInline,
     isExternal, isTailrec, isSuspend, isOperator, isInfix, isExpect,
     containerSource = null,
 ), IrFunctionWithLateBinding {
-    override val isFakeOverride: Boolean
-        get() = true
-
     private var _symbol: IrSimpleFunctionSymbol? = null
 
     override val symbol: IrSimpleFunctionSymbol

compiler/ir/ir.tree/src/org/jetbrains/kotlin/ir/declarations/impl/IrPropertyImpl.kt

@@ -90,14 +90,12 @@ class IrPropertyWithLateBindingImpl(
     isDelegated: Boolean,
     isExternal: Boolean,
     isExpect: Boolean,
+    override val isFakeOverride: Boolean = origin == IrDeclarationOrigin.FAKE_OVERRIDE,
     override val factory: IrFactory = IrFactoryImpl,
 ) : IrPropertyCommonImpl(
     startOffset, endOffset, origin, name, visibility, isVar, isConst, isLateinit, isDelegated, isExternal, isExpect,
     containerSource = null,
 ), IrPropertyWithLateBinding {
-    override val isFakeOverride: Boolean
-        get() = true
-
     private var _symbol: IrPropertySymbol? = null
 
     override val symbol: IrPropertySymbol