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

idea/testData/intentions/convertAssertToIf/assertErrorOverloaded.kt.after

@@ -1,7 +1,5 @@
 package a
 
-import java.lang.AssertionError
-
 fun foo() {
     if (!true) {
         throw AssertionError("text")