[TEST] Add implementation of new infrastructure services for compiler tests

All of new classes lays in lays in :compiler:tests-common-new module
  which includes classes for FE 1.0 and FIR diagnostics tests and
  JVM black boxtests

js/js.config/src/org/jetbrains/kotlin/platform/js/JsPlatform.kt

@@ -15,7 +15,7 @@ abstract class JsPlatform : SimplePlatform("JS") {
 
 @Suppress("DEPRECATION_ERROR")
 object JsPlatforms {
-    private object DefaultSimpleJsPlatform : JsPlatform()
+    object DefaultSimpleJsPlatform : JsPlatform()
 
     @Deprecated(
         message = "Should be accessed only by compatibility layer, other clients should use 'defaultJsPlatform'",