Provide java.util.Collections#shuffle as extensions for collections in JS

#KT-2460

libraries/stdlib/test/collections/MutableCollectionsTest.kt

@@ -101,7 +101,6 @@ class MutableCollectionTest {
         assertEquals(listOf(42, 42, 42), list)
     }
 
-    @JvmVersion
     @Test fun shuffled() {
         val list = MutableList(100) { it }
         val shuffled = list.shuffled()
@@ -127,6 +126,4 @@ class MutableCollectionTest {
 
         assertEquals(shuffled1, shuffled2)
     }
-
-
 }