[Messenger] Add `TransportNamesStamp` to change the transport while dis…

[fabpot]

Q	A
Feature PR	symfony/symfony#39306
PR author(s)	@asilelik, @fabpot
Merged in	6.2

[wouterj]

Hi @asilelik!

I think your cool 6.2 feature deserves documentation. Are you able to create a PR for this?

The most logical place would be somewhere in this section: https://symfony.com/doc/current/messenger.html#routing-messages-to-a-transport (probably in a .. tip:: at the end, just after the "If you configure routing for both a child and parent class ..." note)

[abarkine]

@wouterj thank you for letting me know. Yes, I will be more than happy to include the feature in the mentioned page.