[HttpKernel] Change exception message in case no controller found

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #11754
| License       | MIT
| Doc PR        | n/a

Change the NotFoundHttpException message.
@stof So, the current is wrong, but the new one is too specific. What about something more neutral like "Unable to find the controller for path "%s"; the route is wrongly configured."