…ce id generation for buses (nicolas-grekas)This PR was merged into the 4.1-dev branch.Discussion----------[FrameworkBundle][Messenger] Remove convention-based service id generation for buses| Q             | A| ------------- | ---| Branch?       | master| Bug fix?      | yes (DX)| New feature?  | no| BC breaks?    | no| Deprecations? | no| Tests pass?   | yes| Fixed tickets | -| License       | MIT| Doc PR        | -Service ids for buses are user facing ids: ppl *will* have to deal with them when wiring their services.Like for cache pools, we should ask ppl to declare them using full identifiers, instead of having a convention-based way to turn a name into and id (which is something nobody will be able to remember at some point.)Commits-------c7a0045 [FrameworkBundle][Messenger] Remove convention-based service id generation for buses

This PR was merged into the 4.1 branch.Discussion----------[Messenger] Fix default bus name| Q             | A| ------------- | ---| Branch?       | 4.1 <!-- see below -->| Bug fix?      | yesish| New feature?  | no <!-- don't forget to update src/**/CHANGELOG.md files -->| BC breaks?    | no     <!-- seehttps://symfony.com/bc -->| Deprecations? | no <!-- don't forget to update UPGRADE-*.md and src/**/CHANGELOG.md files -->| Tests pass?   | yes    <!-- please add some, will be required by reviewers -->| Fixed tickets |#27162   <!-- #-prefixed issue number(s), if any -->| License       | MIT| Doc PR        | N/AAfter#27162, the default bus name configured automatically should use a full service id too, otherwise we currently get a `default` service id, no namespace identifier, which is the default bus.Commits-------fa9b984 [Messenger] Fix default bus name

This PR was submitted for the master branch but it was squashed and merged into the 4.1 branch instead (closes#9727).Discussion----------[Messenger] Update the messenger documentation- [x]Fixes#9641 with the middleware configuration.- [x]Fixes#9617 with the multiple bus configuration.- [x] Change adapters to transports (waiting merge:symfony/symfony#27129)- [x] middlewares config entry is renamed middleware (symfony/symfony#27177)- [x] in the config, message buses names are the full service id you'll use (symfony/symfony#27162)- [x] Add TransportInterface as first class citizen sender+receiver (symfony/symfony#27164)Commits-------c3c3528 Few updates following review64bfd75 Change wording and don't use `.`-based services so it's just clearere1f3b5a Fix the formating of the method name9b7b85f Update the example of using multiple buses to use DI's `bind`sc76b2c2 Uses the full service name when configuring the buses from the YAML configuration2409798 Middleware does not have a plurala20286d Add a note about the symfony serializer pack10f46eb Introduce the `TransportInterface`ef70bc0 Add a documentation about the middlewares3ff8cfe Add multiple buses configuration and type-hint examplea4bc592 Rename the adapters to transport