Generate test app when RabbitMQ Streams is selected

[eddumelendez]

Currently, when rabbitmq streams and docker compose/testcontainers are selected, no container is provided. For that reason, the test and test app can not be executed sucessfully. RabbitMQ Streams requires an additional configuration to enable it using Spring Boot and also in the container itself but providing RabbitMQ service would be enough to execute the test and test app.

The configuration to enable rabbitmq streams can be found here

[mhalbritter]

I'd like to wait until spring-projects/spring-boot#42443 is resolved before proceeding here.

[smalghate]

Moving the value to a constant file enhances the maintainability of the code. It centralizes the value, making it easier to update and manage. If the value needs to be changed, it can be done in one place without searching through the entire codebase

[mhalbritter]

To properly get RabbitMQ streams working, we'd need to be able to generate a docker-compose.yaml file which looks like this:

services:
  rabbitmq:
    image: 'rabbitmq:latest'
    environment:
      - 'RABBITMQ_DEFAULT_PASS=secret'
      - 'RABBITMQ_DEFAULT_USER=myuser'
    configs:
      - source: plugins
        target: /etc/rabbitmq/enabled_plugins
    ports:
      - '5672'
      - '5552'

configs:
  plugins:
    content: "[rabbitmq_stream]."

and for Testcontainers:

@Bean
@ServiceConnection(type = RabbitStreamConnectionDetails.class)
RabbitMQContainer rabbitContainer() {
return new RabbitMQContainer(DockerImageName.parse("rabbitmq:latest"))
		.withExposedPorts(5552)
		.withCopyToContainer(Transferable.of("[rabbitmq_stream]."), "/etc/rabbitmq/enabled_plugins");
}

[mhalbritter]

I rebased this branch on top of main.

[mhalbritter]

I've created spring-io/initializr#1758 and #2089 and #2090.