Optimize ir interpretation of Enum.name

There is no need to create honest object in case of such simple
calculation. Furthermore, it can be harmful if enum class has
non-constant initializer or property.

#KT-53480 Fixed

compiler/testData/ir/interpreter/kt53480.kt

@@ -0,0 +1,12 @@
+// FILE: J.java
+public class J {
+    public static int f() { return 0; }
+}
+
+// FILE: Main.kt
+enum class A {
+    E;
+    val x = J.f()
+}
+
+const val name = A.E.name