[Pubsub RabbitMQ] Single Active consumer subscription parameter

[DropSnorz]

What content needs to be created or modified?

Add the singleActiveConsumer parameter to RabbitMQ PubSub Subscription metadata

Describe the solution you'd like

Where should the new material be placed?

https://github.com/dapr/docs/blob/v1.13/daprdocs/content/en/reference/components-reference/supported-pubsub/setup-rabbitmq.md

The associated pull request from dapr/dapr, dapr/components-contrib, or other Dapr code repos

dapr/components-contrib#3437

Additional context

[msfussell]

@DropSnorz - Please complete this docs issue