Drop enum class object hack

Place valueOf() and values() into the static scope of the corresponding enum
class

 #KT-5580 Fixed
 #KT-2410 Fixed

compiler/testData/loadJava/compiledKotlin/annotations/parameters/EnumConstructor.txt

@@ -17,9 +17,7 @@ internal final enum class E : kotlin.Enum<test.E> {
     public final override /*1*/ /*fake_override*/ fun name(): kotlin.String
     public final override /*1*/ /*fake_override*/ fun ordinal(): kotlin.Int
     
-    public class object <class-object-for-E> {
-        /*primary*/ private constructor <class-object-for-E>()
-        public final /*synthesized*/ fun valueOf(/*0*/ value: kotlin.String): test.E
-        public final /*synthesized*/ fun values(): kotlin.Array<test.E>
-    }
+    // Static members
+    public final /*synthesized*/ fun valueOf(/*0*/ value: kotlin.String): test.E
+    public final /*synthesized*/ fun values(): kotlin.Array<test.E>
 }