Enable remote read api protocol

Enabling remote read api protocol allows users to take their data from AMP easily and fast, skipping the PromQL evaluation.

Some of the possible use cases for this are described here.

We have at least another two:

If (for some reason) AMP isn't the right tool for us, having this feature gives us confidence that we have an easy and friendly way to migrate the data from AMP to another infrastructure (a self-managed for example).
Export data to be processed by other means besides PromQL.

aws / amazon-managed-service-for-prometheus-roadmap