Improve header/impl mismatch diagnostic messages

Try to report most mismatch errors on the 'impl' declaration. Only
report a mismatch error on the 'header' declaration if no error would be
otherwise reported on any 'impl' declaration in the compilation unit.
Also render declaration kind in the message

 #KT-18447 In Progress

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

@@ -1,6 +1,6 @@
 // "Implement members" "true"
 // WITH_RUNTIME
-// ERROR: Header declaration 'InterfaceWithFuns' has no implementation in module light_idea_test_case for JVM
+// ERROR: 'header' interface 'InterfaceWithFuns' has no implementation in module light_idea_test_case for JVM
 header interface InterfaceWithFuns {
     fun funInInterface()
 }
@@ -9,4 +9,4 @@ class ChildOfInterface : InterfaceWithFuns{
     override fun funInInterface() {
         TODO("not implemented") //To change body of created functions use File | Settings | File Templates.
     }
-}
+}