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/statics/inheritedPropertyInClassObject.kt

@@ -0,0 +1,13 @@
+open class Bar<T>(val prop: String)
+class Foo {
+    companion object : Bar<Foo>("OK") {
+        val p = Foo.prop
+        val p2 = prop
+        val p3 = this.prop
+    }
+
+    val p4 = Foo.prop
+    val p5 = prop
+}
+
+fun box(): String = Foo.prop