Specify connection name for the RabbitMQ exporter from config

[snichme]

Component(s)

exporter/rabbitmq

Is your feature request related to a problem? Please describe.

Having a lot of agents connecting to the same RabbitMQ server makes it difficult to detect which connection might be having issue and from where the connection comes from.

Describe the solution you'd like

Be able to specify the name of the connection in the config for the agent.

Describe alternatives you've considered

No response

Additional context

No response

[github-actions]

Pinging code owners:

• exporter/rabbitmq: @swar8080 @atoulme

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[crobert-1]

Removing needs triage as code owner has approved PR for this change`.