FIR: Fix interface delegation case via type alias

compiler/testData/codegen/box/delegation/viaTypeAlias.kt

@@ -0,0 +1,17 @@
+public interface MyMap<K, V> {
+    fun get(k: K): V
+}
+
+typealias MyMapAlias<X, Y> = MyMap<X, Y>
+
+abstract class A<T, E>(val m: MyMapAlias<T, E>) : MyMapAlias<T, E> by m
+
+class B : A<String, String>(object : MyMap<String, String> {
+    override fun get(w: String): String {
+        return w + "K"
+    }
+})
+
+fun box(): String {
+    return B().get("O")
+}