QuickFixMultiModule: change tests structure

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

@@ -0,0 +1,13 @@
+// "Create actual class for module testModule_JVM (JVM)" "true"
+
+expect class <caret>WithNested {
+    fun foo(): Int
+
+    class Nested {
+        fun bar()
+    }
+
+    inner class Inner {
+        fun baz()
+    }
+}