JS: create new common directory for all generated tests, migrate several tests there

js/js.translator/testData/box/inline/iteratorOnInlineFunctionResult.kt

@@ -0,0 +1,12 @@
+package foo
+
+inline fun bar(f: () -> Int): Array<Int> = arrayOf(f())
+
+fun box(): String {
+    val iterator = bar { 23 }.iterator()
+    assertEquals(true, iterator.hasNext())
+    assertEquals(23, iterator.next())
+    assertEquals(false, iterator.hasNext())
+
+    return "OK"
+}