Move properties of enum class object to the enum class

Similar to how it's done for usual classes

compiler/testData/codegen/box/enum/classObjectInEnum.kt

@@ -11,7 +11,7 @@ enum class Game {
 
 fun box(): String {
     if (Game.foo() != Game.ROCK) return "Fail 1"
-    // TODO: fix initialization order and uncomment
+    // TODO: fix initialization order and uncomment (KT-5761)
     // if (Game.bar != Game.PAPER) return "Fail 2: ${Game.bar}"
     if (Game.values().size != 3) return "Fail 3"
     if (Game.valueOf("SCISSORS") != Game.SCISSORS) return "Fail 4"