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/codegen/box/constants/kt53480.kt

@@ -0,0 +1,15 @@
+// TARGET_BACKEND: JVM_IR
+// FILE: J.java
+public class J {
+    public static int f() { return 0; }
+}
+
+// FILE: Main.kt
+enum class A {
+    OK;
+    val x = J.f()
+}
+
+fun box(): String {
+    return A.OK.name
+}