KT-322 Prohibit inheriting classes from enums

#KT-322 Fixed

compiler/testData/diagnostics/tests/DelegationNotTotrait.kt

@@ -8,7 +8,7 @@ trait T {}
 
 class Br(t : T) : T by t {}
 
-open enum class EN() {
+<!OPEN_MODIFIER_IN_ENUM!>open<!> enum class EN() {
   A
 }
 

compiler/testData/diagnostics/tests/declarationChecks/kt1193.kt

@@ -2,7 +2,7 @@
 
 package kt1193
 
-open enum class MyEnum(val i: Int) {
+enum class MyEnum(val i: Int) {
     A : MyEnum(12)
     <!ENUM_ENTRY_SHOULD_BE_INITIALIZED!>B<!>  //no error
 }

compiler/testData/diagnostics/tests/enum/inheritanceFromEnum.kt

@@ -0,0 +1,13 @@
+// FILE: MyJavaEnum.java
+public enum MyJavaEnum {}
+
+// FILE: test.kt
+<!OPEN_MODIFIER_IN_ENUM!>open<!> enum class MyEnum() {
+    A: MyEnum()
+}
+
+enum class MyEnum2() {}
+
+class MyClass(): <!INVISIBLE_MEMBER, FINAL_SUPERTYPE!>MyEnum2<!>() {}
+
+class MyClass2(): <!FINAL_SUPERTYPE!>MyJavaEnum<!>() {}