Metric submission sub system

[jezdez]

Once metrics are collected, the metric submission will be next in line to receive the data and send it over to a pre-configured OpenTelemetry (otel) backend.

That means it requires:

• A way to pre-configure the otel URL to submit to
• Set any additional otel specific configuration (e.g. timeout, proxy use etc)
• Options: be configurable via configuration or environment variables

[jezdez]

Once we have the otel backend available and add a otel implementation for the submission subsystem, we should slightly abstract the existing system, so that that we can utilize the http submission system for environments that don't have access to our otel endpoints, e.g. on-prem PSM, or other repo implementations out of our control.