[feature-request] Auto-configure Rabbit message listener container to use a virtual thread based executor

[ferblaca]

Describe the feature request
Based on spring-projects/spring-boot#36387, when virtual threads are enabled, auto-configure Rabbit Message listener container (AbstractMessageListenerContainer) to use a virtual thread based executor.

Currently, enabling virtual threads does not automatically configure the executor as virtual threads. To achieve this behavior a ListenerContainerCustomizer can be configured as follows:

@ConditionalOnEnabledVirtualThreads
public class RabbitMQListenerContainerConfiguration {

  @Bean
  public ListenerContainerCustomizer<MessageListenerContainer> threadingListenerContainerCustomizer() {
    return (container, destination, group) -> {
      if (container instanceof final AbstractMessageListenerContainer listenerContainer) {
        final SimpleAsyncTaskExecutor executor = new SimpleAsyncTaskExecutor(destination + "-" + group);
        executor.setVirtualThreads(true);
        listenerContainer.setTaskExecutor(executor);
      }
    };
  }
}

But it would be nice not to have to do this for every RabbitMQ binder configured and have it automatically configured with SCS.

Version of the framework
Spring Boot 3.3.5
Spring Cloud 2023.0.3