Report "declaration should be marked with impl" when possible

Also support a quick fix to add 'impl' modifier (KT-18454), although it
doesn't work yet on classes because there's no error on them in the IDE

 #KT-18087 Fixed
 #KT-18452 Fixed
 #KT-18454

libraries/kotlin.test/js/src/main/kotlin/org/junit/junitTest.kt

@@ -3,4 +3,4 @@ package org.junit
 @Deprecated("Use 'Test' from kotlin.test package",
         replaceWith = ReplaceWith("Test", "kotlin.test.Test"),
         level = DeprecationLevel.WARNING)
-typealias Test = kotlin.test.Test
+impl typealias Test = kotlin.test.Test