RabbitMQ broker deprecating the metrics collection via management plugin

[DavidBoike]

• Copied from RabbitMQ broker deprecating the metrics collection via management plugin ServiceControl#4691

Describe the suggested improvement

RabbitMQ broker has deprecated management_metrics_collection which is responsible for providing queue length data (and other dynamic queue-related metrics). It has been deprecated since 2021 but it has been largely ignored by the community until a warning message started to pop up in the log files.

2024-03-13 19:04:00.669077+00:00 [warning] <0.745.0> By default, this feature can still be used for now.
2024-03-13 19:04:00.669077+00:00 [warning] <0.745.0> Its use will not be permitted by default in a future minor RabbitMQ version and the feature will be removed from a future major RabbitMQ version; actual versions to be determined.

The recommended approach by the RabbitMQ team is to use Prometheus Plugin and use Prometheus to get the queue length and other information.

Additional Context

The change is going to affect the queue length and throughput monitoring.