[Messenger] refactoring to get rid of SendersLocatorInterface::getSenderByAlias

[Tobion]

Refactoring idea: Move the ReceivedStamp and RedeliveryStamp logic from the SendMessageMiddleware into the SendersLocator (or a decorator of it).
This avoids the need of requiring a SendersLocatorInterface::getSenderByAlias method and makes the code cleaner.

[Tobion]

Another idea: Inject the failed SenderInterface into the SendFailedMessageToFailureTransportListener instead of the MessageBusInterface.
If we also send retry messages directly to the sender instead of redispatching in the worker, we don't need \Symfony\Component\Messenger\Stamp\RedeliveryStamp::getSenderClassOrAlias all all.