[improve] RabbitMq connector options

[akulabs8]

Purpose of this pull request

subtask of #8576

Check list

• If any new Jar binary package adding in your PR, please add License Notice according
  New License Guide
• If necessary, please update the documentation to describe the new feature. https://github.com/apache/seatunnel/tree/dev/docs
• If you are contributing the connector code, please check that the following files are updated:
  1. Update plugin-mapping.properties and add new connector information in it
  2. Update the pom file of seatunnel-dist
  3. Add ci label in label-scope-conf
  4. Add e2e testcase in seatunnel-e2e
  5. Update connector plugin_config
• Update the release-note.

[liunaijie]

I think we should split Config and Options into two classes.
The Options class is used to record the parameters we can pass from the configuration file (external).
The RabbitmqConfig here is a class use to pass parameteres internal.

So, I think we need to split them. Please share your thoughts with me.