Migrate boxWithJava tests to multi-file framework

compiler/testData/codegen/boxWithJava/annotationsWithKClass/array.kt

@@ -0,0 +1,22 @@
+// FILE: Test.java
+
+class O {}
+class K {}
+
+@Ann(args={O.class, K.class})
+class Test {
+}
+
+// FILE: array.kt
+
+import kotlin.reflect.KClass
+
+@Retention(AnnotationRetention.RUNTIME)
+annotation class Ann(val args: Array<KClass<*>>)
+
+fun box(): String {
+    val args = Test::class.java.getAnnotation(Ann::class.java).args
+    val argName1 = args[0].simpleName ?: "fail 1"
+    val argName2 = args[1].simpleName ?: "fail 2"
+    return argName1 + argName2
+}