Refactor JS tests: unified package name, test JS specific map implementations only in JS.

Add required files to build StdLibTestToJSTest.
Remove tests StdLibMapJsTest and StdLibSetJsTest because they are tested elsewhere.

libraries/stdlib/test/js/JsArrayScript.kt

@@ -1,17 +1,18 @@
+// this package referenced from testArrayScriptTest
 package jstest
 
 fun testSize(): Int {
-    val a1 = array<String>()
-    val a2 = array("foo")
-    val a3 = array("foo", "bar")
+    val a1 = arrayOf<String>()
+    val a2 = arrayOf("foo")
+    val a3 = arrayOf("foo", "bar")
 
     return a1.size() + a2.size() + a3.size()
 }
 
 fun testToListToString(): String {
-    val a1 = array<String>()
-    val a2 = array("foo")
-    val a3 = array("foo", "bar")
+    val a1 = arrayOf<String>()
+    val a2 = arrayOf("foo")
+    val a3 = arrayOf("foo", "bar")
 
     return a1.toList().toString() + "-" + a2.toList().toString() + "-" + a3.toList().toString()
 }