Update test data for tower resolution algorithm

- locals win
- unary calls to plus/minus are not supported in favor of unaryPlus/unaryMinus
- unqualified nested classes are temporarily reported as unresolved
- function without receiver win against extension function
- explicit import win against star import

compiler/testData/diagnostics/tests/inner/extensionFun.kt

@@ -23,6 +23,6 @@ class Outer {
 
 fun Outer.foo() {
     Outer()
-    <!NESTED_CLASS_SHOULD_BE_QUALIFIED!>Nested<!>()
+    <!UNRESOLVED_REFERENCE!>Nested<!>()
     Inner()
 }