Missing core metrics from remote-storage-manager-metrics

# What happened?

I'm running the current newest build ([2024-10-23-1729694047](https://github.com/Aiven-Open/tiered-storage-for-apache-kafka/releases/tag/2024-10-23-1729694047)) and configured my jmx exporter to pick up the metrics from the plugin, and I do see the metrics from aiven.kafka.server.tieredstorage.cache , aiven.kafka.server.tieredstorage.s3, and aiven.kafka.server.tieredstorage.thread-pool, but not aiven.kafka.server.tieredstorage (specifically type=`remote-storage-manager-metrics`)

I've verified this with `./kafka-run-class.sh kafka.tools.JmxTool` to ensure that it's not an issue with the jmx exporter configuration.

Side note -- I wanted to run the demo locally to rule out any issues with my setup but the demo image is private, is there any way to make that available publicly?

# What did you expect to happen?

I expect to see the core metrics (aiven.kafka.server.tieredstorage:type=remote-storage-manager-metrics)

# What else do we need to know?

- version: `2024-10-23-1729694047`
- kafka version: `2.7.1`
- jmx exporter version: `0.16.1`