Uncouple Server and Logger lifecycles

[ignasi35]

(from akka/akka#28212 (comment))

NettySevrer and AkkaHTTPServer add a Coordinated Shutdown task that invokes super.stop() knowing that the super trait closes the Logger on that call.

This should be decoupled and the Logging infrastructure should be stopped at a later stage, probably

[AndySakov]

I think I'll work on this

[mkurz]

@AndySakov Sure, just open a pull request, if you need any help please let us know!

[mkurz]

@AndySakov I saw your conversation in the Discord channel, if you need any help please let me know ,thanks!