[Wasm] Support lazy associated object initialisation

Fix #KT-63939

libraries/stdlib/wasm/src/kotlin/reflect/associatedObjectsImpl.kt

@@ -8,35 +8,16 @@ package kotlin.wasm.internal
 import kotlin.reflect.wasm.internal.KClassImpl
 import kotlin.reflect.KClass
 
-internal var associatedObjects: Map<ULong, Any>? = null
-
 @PublishedApi
 internal fun findAssociatedObject(klass: KClass<*>, key: Int): Any? {
     val klassId = (klass as? KClassImpl<*>)?.typeData?.typeId ?: return null
-
-    val map = associatedObjects ?: run {
-        val newMap: MutableMap<ULong, Any> = mutableMapOf()
-        initAssociatedObjects(newMap)
-        associatedObjects = newMap
-        newMap
-    }
-
-    return map[packIntoULong(klassId, key)]
+    return tryGetAssociatedObject(klassId, key)
 }
 
-internal fun packIntoULong(a: Int, b: Int): ULong =
-    (a.toUInt().toULong() shl Int.SIZE_BITS) or b.toUInt().toULong()
-
-internal fun addAssociatedObject(
-    mapToInit: MutableMap<ULong, Any>,
-    klassId: Int,
-    keyId: Int,
-    instance: Any
-) {
-    mapToInit[packIntoULong(klassId, keyId)] = instance
-}
-
-internal fun initAssociatedObjects(@Suppress("UNUSED_PARAMETER") mapToInit: MutableMap<ULong, Any>) {
+internal fun tryGetAssociatedObject(
+    @Suppress("UNUSED_PARAMETER") klassId: Int,
+    @Suppress("UNUSED_PARAMETER") keyId: Int,
+): Any? {
     // Init implicitly with AssociatedObjectsLowering
-    // addAssociatedObject(mapToInit, ...)
+    return null
 }