What are you seeing
There currently is an issue at RabbitMQ, rabbitmq/rabbitmq-server#8386,
about the removal of PackageCloud as package repo.
There already is a Launchpad bug for openstack-ansible, https://review.opendev.org/q/topic:fix%252Frabbitmq-packagecloud-deprecation, and I believe this likely should coincide to a change to puppet-rabbitmq as well.