Intentions: 'Implement abstract member' (Kotlin -> Kotlin)

#KT-8467 In Progress

idea/testData/intentions/implementAbstractMember/function/enumEntriesWithArgs.kt

@@ -0,0 +1,7 @@
+// WITH_RUNTIME
+//DISABLE-ERRORS
+enum class E(n: Int) {
+    A(1), B(2), C(3);
+
+    abstract fun <caret>foo(x: Int): Int
+}