Move some tests from boxWithStdlib/ to box/

Move those tests which do not require neither stdlib nor reflect

compiler/testData/codegen/box/arrays/kt1291.kt

@@ -0,0 +1,27 @@
+var result = 0
+
+fun <T> Iterator<T>.foreach(action: (T) -> Unit) {
+    while (this.hasNext()) {
+        (action)(this.next())
+    }
+}
+
+fun <In, Out> Iterator<In>.select(f: (In) -> Out) : Iterator<Out> {
+    return Selector(this, f);
+}
+
+class Selector<In, Out>(val source: Iterator<In>, val f: (In) -> Out) : Iterator<Out> {
+    override fun hasNext(): Boolean = source.hasNext()
+
+    override fun next(): Out {
+        return (f)(source.next())
+    }
+}
+
+fun box(): String {
+    Array(4, { it + 1 }).iterator()
+            .select({i -> i * 10})
+            .foreach({k -> result += k})
+    if (result != 10+20+30+40) return "Fail: $result"
+    return "OK"
+}