AWS::AmazonMQ::Broker - Fix AmazonMQ documentation

### Name of the resource

AWS::AmazonMQ::Broker

### Resource name

_No response_

### Reference Link

https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-amazonmq-broker.html
https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-amazonmq-configuration.html
https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-amazonmq-configurationassociation.html

### Details

1. Configuration can now be applied to RabbitMQ brokers. Update documentation for the `Configuration` property of the broker to remove the "does not apply to rabbit" message and remove the equivalent information from the Configuration and Association (this is also mentioned in various properties).
`AWS::AmazonMQ::Configuration` can be created with `EngineType: RABBITMQ` so that should be added as an allowed value.

2. Fix the `AWS::AmazonMQ::Configuration` documentation to remove the incorrect `Id` return value listed. Attempting to use `!GetAtt Broker.Id` causes `Attribute 'Id' does not exist` error (also mentioned in #1658). Only `Ref` works as a way of getting ID value.

Start with the three referenced AWS CloudFormation documentation pages for AWS::AmazonMQ::Broker, AWS::AmazonMQ::Configuration, and AWS::AmazonMQ::ConfigurationAssociation. Verify the Configuration and EngineType text, remove the incorrect Id return value, and confirm the documentation reflects RabbitMQ support and the stated Ref behavior.

Written by the indexing model from the issue text.