Rewrite hack in codegen for lambdas in anonymous object super calls

Synthetic ClassDescriptor created in codegen for lambdas and such should have
correct container, because it'll be used in generation of InnerClasses

compiler/testData/codegen/boxWithStdlib/reflection/enclosing/lambda/lambdaInObjectExpression.kt

@@ -1,7 +1,14 @@
-open class C(val a: Any)
+trait C {
+    val a: Any
+}
 
 fun box(): String {
-    val l = object : C({}) {
+    val l = object : C {
+        override val a: Any
+
+        {
+            a = {}
+        }
     }
 
     val javaClass = l.a.javaClass
@@ -17,4 +24,4 @@ fun box(): String {
     if (declaringClass != null) return "anonymous function has a declaring class: $declaringClass"
 
     return "OK"
-}
+}