Use properties of Java annotations in codegen tests

Retain obsolete versions until support for methods in Java annotations is dropped

compiler/testData/codegen/boxAgainstJava/annotations/kClassMapping/varargClassParameter.kt

@@ -4,7 +4,7 @@ class K
 JavaAnn(O::class, K::class) class MyClass
 
 fun box(): String {
-    val args = javaClass<MyClass>().getAnnotation(javaClass<JavaAnn>()).value()
+    val args = javaClass<MyClass>().getAnnotation(javaClass<JavaAnn>()).value
     val argName1 = args[0].simpleName ?: "fail 1"
     val argName2 = args[1].simpleName ?: "fail 2"
     return argName1 + argName2