[FIR] add reversed testData to update it in the next commit

^KT-56543

compiler/testData/diagnostics/tests/FreeFunctionCalledAsExtension.reversed.kt

@@ -0,0 +1,14 @@
+fun foo(a: (String) -> Unit) {
+    "".<!UNRESOLVED_REFERENCE!>a<!>()
+}
+
+
+
+interface A : (String) -> Unit {}
+typealias AliasedEFT = ExtensionFunctionType
+
+fun foo(a: <!WRONG_EXTENSION_FUNCTION_TYPE!>@AliasedEFT<!> A) {
+    // @Extension annotation on an unrelated type shouldn't have any effect on this diagnostic.
+    // Only kotlin.Function{n} type annotated with @Extension should
+    "".a()
+}