We want to allow customers to customize their metrics. In order to do that, it will be easier if they were gathered in one controller for collection.

With the introduction of the eventing system, a huge change will be taken place in the way that MCO reports its telemetries. When it comes to metrics, originally, the metrics are updated separately in each MCO sub-component by directly write to Prometheus label. All updated metrics need to be collected by the state controller and reported afterwards. As a result,  we will need to update current metric update method to event messages.

Completion Criteria:

1. All metric updates are replaced by event messages

Done by the end of sprint 242 and demo-ed in https://drive.google.com/file/d/10Ak3Wb7x7x4HKSDqnXJtliyywG0uDQiY/view

Will not be adopted due to exceeding allowed amount of events.