Added redirect controller

This PR adds a dedicated `RedirectController` to handle AutoRoutes which have been assigned the `cmf_routing_auto.redirect` type.

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | 
| License       | MIT
| Doc PR        | https://github.com/symfony-cmf/symfony-cmf-docs/pull/620


ah ok, if its a different class then i am fine with this. generally implementing the redirect interface with the AutoRoute would feel wrong i think - although, why not?