GraphQL: Fix alias redirects.

[dbosen]

This fixes the thunder_redirect data producer to also redirect from canonical urls to aliases (if the redirect module is configured todo so)

[mrmishmash]

While this is being adjusted, I'd like to note that the producer does not URL decode the path argument. So let's say a SEO inserts a redirect:

/wasserdruck-erhöhen -> /wasserdruck-erhoehen

In some cases, like persisted queries, the path will be URL encoded, since it's passed via GET, this will then lead to a 404 on the URL because the redirect source path does not exist in the database in an encoded form.