Move some tests from boxWithStdlib/ to box/

Move those tests which do not require neither stdlib nor reflect

compiler/testData/codegen/box/callableReference/property/extensionToArray.kt

@@ -0,0 +1,6 @@
+val Array<String>.firstElement: String get() = get(0)
+
+fun box(): String {
+    val p = Array<String>::firstElement
+    return p.get(arrayOf("OK", "Fail"))
+}