Fix regular quick-fix test with multi-platforms required

idea/idea-test-framework/src/org/jetbrains/kotlin/idea/test/KotlinLightCodeInsightFixtureTestCase.kt

@@ -132,12 +132,14 @@ abstract class KotlinLightCodeInsightFixtureTestCase : KotlinLightCodeInsightFix
                 else if (InTextDirectivesUtils.isDirectiveDefined(fileText, "JS")) {
                     return KotlinStdJSProjectDescriptor
                 }
+                else if (InTextDirectivesUtils.isDirectiveDefined(fileText, "ENABLE_MULTIPLATFORM")) {
+                    return KotlinProjectDescriptorWithFacet.KOTLIN_STABLE_WITH_MULTIPLATFORM
+                }
             }
             catch (e: IOException) {
                 throw rethrow(e)
             }
         }
-
         return KotlinLightProjectDescriptor.INSTANCE
     }
 

idea/testData/quickfix/implement/doNotAddHeader.kt

@@ -1,6 +1,9 @@
 // "Implement members" "true"
-// WITH_RUNTIME
+// ENABLE_MULTIPLATFORM
 // ERROR: Expected interface 'InterfaceWithFuns' has no actual in module light_idea_test_case for JVM
+
+fun TODO(s: String): Nothing = null!!
+
 expect interface InterfaceWithFuns {
     fun funInInterface()
 }

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

@@ -1,6 +1,9 @@
 // "Implement members" "true"
-// WITH_RUNTIME
+// ENABLE_MULTIPLATFORM
 // ERROR: Expected interface 'InterfaceWithFuns' has no actual in module light_idea_test_case for JVM
+
+fun TODO(s: String): Nothing = null!!
+
 expect interface InterfaceWithFuns {
     fun funInInterface()
 }