Move some tests from boxWithStdlib/ to box/

Move those tests which do not require neither stdlib nor reflect

compiler/testData/codegen/box/lazyCodegen/toString.kt

@@ -0,0 +1,12 @@
+class A (val p: String) {
+
+    val _kind: String = "$p"
+
+}
+
+fun box(): String {
+
+    if (A("OK")._kind != "OK") return "fail"
+
+    return "OK"
+}