KT-322 Prohibit inheriting classes from enums

#KT-322 Fixed

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<!>() {}