[IR Actualizer] Fix fake-override generation in actual A -> common B -> actual C hierarchy

...  where C defines a member x and A overrides the member x

#KT-61166 Fixed

compiler/testData/codegen/box/multiplatform/kt61166.kt

@@ -0,0 +1,26 @@
+// LANGUAGE: +MultiPlatformProjects
+// TARGET_BACKEND: JVM_IR
+// IGNORE_BACKEND_K1: ANY
+// ISSUE: KT-60854
+// WITH_STDLIB
+// FULL_JDK
+
+// MODULE: common
+// FILE: common.kt
+expect object A
+abstract class B : C()
+expect abstract class C()
+
+// MODULE: intermediate()()(common)
+// FILE: intermediate.kt
+actual object A : B() {
+    override val x: String get() = "OK"
+}
+
+actual abstract class C {
+    abstract val x: String
+}
+// MODULE: platform()()(intermediate)
+// FILE: platform.kt
+
+fun box(): String = A.x