QuickFixMultiModule: change tests structure

idea/testData/multiModuleQuickFix/other/memberFunReceiverToParameterByImpl/header/header.kt

@@ -0,0 +1,7 @@
+expect class Foo {
+    fun String.foo(n: Int)
+}
+
+fun Foo.test() {
+    "1".foo(2)
+}