Migrate boxWithJava tests to multi-file framework

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

@@ -0,0 +1,19 @@
+// FILE: Test.java
+
+class OK {}
+
+@Ann(arg=OK.class)
+class Test {
+}
+
+// FILE: basic.kt
+
+import kotlin.reflect.KClass
+
+@Retention(AnnotationRetention.RUNTIME)
+annotation class Ann(val arg: KClass<*>)
+
+fun box(): String {
+    val argName = Test::class.java.getAnnotation(Ann::class.java).arg.simpleName ?: "fail 1"
+    return argName
+}