[Routing] Allow using services in the route condition

[Tobion]

Q	A
Feature PR	symfony/symfony#44405
PR author(s)	@renanbr
Merged in	6.1

[wouterj]

Hi @renanbr. This looks like a pretty big feature! Are you willing to (and do you have time) to write a bit of documentation about the feature?

I think the best would be to add the service() function to the list in https://symfony.com/doc/6.1/routing.html#matching-expressions
And then add a small section paragraph basically saying "you'll have to add the #[AsRoutingConditionService] attribute or ... tag to your service if you want to use it in the condition".