Move some tests from boxWithStdlib/ to box/

Move those tests which do not require neither stdlib nor reflect

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

@@ -0,0 +1,15 @@
+class A (val p: String) {
+
+    val _kind: String = when {
+        p == "test" -> "OK"
+        else -> "fail"
+    }
+
+}
+
+fun box(): String {
+
+    if (A("test")._kind != "OK") return "fail"
+
+    return "OK"
+}