backend/tests: Add blackbox tests from Kotlin JVM

Added tests from testData/codegen/box directory. There are blackbox tests
in other directories and they are to be added.

backend.native/tests/external/codegen/blackbox/reflection/kClassInAnnotation/basic.kt

@@ -0,0 +1,18 @@
+// TODO: muted automatically, investigate should it be ran for JS or not
+// IGNORE_BACKEND: JS
+
+// WITH_REFLECT
+
+import kotlin.reflect.KClass
+
+@Retention(AnnotationRetention.RUNTIME)
+annotation class Ann(val arg: KClass<*>)
+
+class OK
+
+@Ann(OK::class) class MyClass
+
+fun box(): String {
+    val argName = MyClass::class.java.getAnnotation(Ann::class.java).arg.simpleName ?: "fail 1"
+    return argName
+}