[K/N] Avoid creating fake overrides before setting class parent

This fixes a tests crash introduced in #KT-61366 fix.

kotlin-native/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/cgen/CBridgeGen.kt

@@ -1223,9 +1223,10 @@ private class ObjCBlockPointerValuePassing(
             +irReturn(callBlock(blockPointer, arguments))
         }
 
+        stubs.addKotlin(irClass)
+        // we need to add class to stubs first, because it will implicitly initialize class parent.
         irClass.addFakeOverrides(stubs.typeSystem)
 
-        stubs.addKotlin(irClass)
         return constructor
     }