Issue Description: A kafka topic and a dns entry must be created by the fleet manager when the bridge is prepared

Acceptance Criteria: The fleet manager creates a kafka topic and a dns entry for an accepted bridge

Out of Scope: <Here you need to fill in what is out of scope for this issue and then create new issues if necessary in the backlog for the work>

Additional Information: <Add any additional information here that may be helpful to people reading the ticket>