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.txt

@@ -1,7 +1,7 @@
 package
 
-public fun a(): kotlin.Unit
-public fun b(): kotlin.Unit
+public fun test(): kotlin.Unit
+public fun test2(): kotlin.Unit
 
 public open class Anc : Base {
     public constructor Anc()