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/Operators.kt

@@ -38,7 +38,7 @@ class Example2 {
     public operator fun invoke() {}
 }
 
-fun a() {
+fun test() {
     var a = Example()
     var b = Example()
     var c = Example2()
@@ -107,7 +107,7 @@ open class Anc : Base() {
 
 class Anc2 : Anc()
 
-fun b() {
+fun test2() {
     Anc() + Anc()
     Anc() <!OPERATOR_MODIFIER_REQUIRED!>-<!> Anc()
     Anc2() + Anc2()