[JS IR BE] Support Enum::values

libraries/stdlib/js/irRuntime/Enum.kt

@@ -5,9 +5,9 @@
 
 package kotlin
 
-public class Enum<T : Enum<T>>(val name: String, val ordinal: Int) : Comparable<Enum<T>> {
+public class Enum<E : Enum<E>>(val name: String, val ordinal: Int) : Comparable<E> {
 
-    override fun compareTo(other: Enum<T>) = ordinal.compareTo(other.ordinal)
+    override fun compareTo(other: E) = ordinal.compareTo(other.ordinal)
 
     override fun equals(other: Any?) = this === other
 

libraries/stdlib/js/irRuntime/core.kt

@@ -85,5 +85,4 @@ fun getNumberHashCode(obj: dynamic) = js("""
     }
 """).unsafeCast<Int>()
 
-// TODO: Use getObjectHashCode instead
-fun identityHashCode(obj: dynamic): Int = hashCode(obj)
+fun identityHashCode(obj: dynamic): Int = getObjectHashCode(obj)