Implement members: fix it works correctly for data class

#KT-36686 Fixed

idea/testData/quickfix/implement/dataClass3.kt.after

@@ -0,0 +1,12 @@
+// "Implement members" "true"
+// WITH_RUNTIME
+interface I {
+    fun foo()
+}
+
+data class C(val i: Int) : I {
+    fun bar() {}
+    override fun foo() {
+        TODO("Not yet implemented")
+    }
+}