"Make abstract" is no longer applicable to object / enum entry members #KT-3797 Fixed

idea/testData/quickfix/abstract/makeEnumEntryAbstract.kt

@@ -0,0 +1,9 @@
+// "Make 'A' abstract" "false"
+// ACTION: Implement members
+// ERROR: Class 'A' must be declared abstract or implement abstract member public abstract fun foo(): Unit defined in E
+
+enum class E {
+    <caret>A;
+
+    abstract fun foo()
+}