feat: Add publish-side RabbitMQ dead-letter queue configuration

[frankvdb7]

Summary

• Adds DeadLetterQueueing(...) to options.PublishMessage().ToRabbitQueue(...) so publish-side RabbitMQ queues can override their dead-letter queue the same way listeners can.
• Ensure queue declaration respects the configured DLQ when Wolverine auto-provisions RabbitMQ resources.
• Add focused regression coverage for publish-side DLQ configuration and auto-provision behavior.

Validation

• Ran the focused RabbitMQ test slice and it passed on both net9.0 and net10.0.