[Fir2IR] Set correct module descriptors for builtins

^KT-64420

compiler/testData/ir/irText/declarations/internalStdlibOverride.kt

@@ -0,0 +1,14 @@
+// WITH_STDLIB
+// ENABLE_IR_FAKE_OVERRIDE_GENERATION
+// KT-64692
+// MUTE_SIGNATURE_COMPARISON_K2: JVM_IR
+
+// test data differs - no getOrDefault in AbstractMap for non-jvm.
+// IGNORE_BACKEND: NATIVE, JS, JS_IR, JS_IR_ES6, WASM
+
+class MyMap : AbstractMap<Int, Int>() {
+    override val entries = emptySet<Map.Entry<Int, Int>>()
+
+    // clash with stdlib internal function
+    fun containsEntry(entry: Map.Entry<*, *>?) = false
+}