QuickFixMultiModule: change tests structure

idea/testData/multiModuleQuickFix/createActual/sealedSubclass/header/header.kt

@@ -0,0 +1,7 @@
+// "Create actual class for module testModule_JS (JS)" "true"
+
+expect sealed class Sealed
+
+expect object Obj : Sealed
+
+expect class <caret>Klass(x: Int) : Sealed