Implement members: don't add 'actual' modifier for fake overrides

#KT-25044 Fixed

idea/testData/multiModuleQuickFix/implementMembersInActualClassNoExpectMember/common/common.kt

@@ -0,0 +1,5 @@
+expect interface ExpInterface {
+    fun first()
+}
+
+expect class ExpImpl : ExpInterface { }

idea/testData/multiModuleQuickFix/implementMembersInActualClassNoExpectMember/common/common.kt.after

@@ -0,0 +1,5 @@
+expect interface ExpInterface {
+    fun first()
+}
+
+expect class ExpImpl : ExpInterface { }

idea/testData/multiModuleQuickFix/implementMembersInActualClassNoExpectMember/jvm/jvm.kt

@@ -0,0 +1,8 @@
+// "Implement members" "true"
+// ERROR: Class 'ExpImpl' is not abstract and does not implement abstract member public abstract actual fun first(): Unit defined in ExpInterface
+
+actual interface ExpInterface {
+    actual fun first()
+}
+
+actual class ExpImpl<caret> : ExpInterface

idea/testData/multiModuleQuickFix/implementMembersInActualClassNoExpectMember/jvm/jvm.kt.after

@@ -0,0 +1,12 @@
+// "Implement members" "true"
+// ERROR: Class 'ExpImpl' is not abstract and does not implement abstract member public abstract actual fun first(): Unit defined in ExpInterface
+
+actual interface ExpInterface {
+    actual fun first()
+}
+
+actual class ExpImpl : ExpInterface {
+    override fun first() {
+        TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
+    }
+}