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

@@ -1,9 +1,9 @@
 // "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()
 }
 
 class <caret>ChildOfInterface : InterfaceWithFuns{
-}
+}