Support metrics export to OTEL collector

[holgerstolzenberg]

Situation

It looks like the Helm chart currently only supports metrics via Prometheus endpoint. I could not find configuration settings to also export metrics to OTEL collector, like it can be done with traces.

The problem

Having a metrics endpoint is fine, but it breaks the self-contained-ness of the deployment (you have to add scrape target to a external config file).

Wish

It would be really cool of the chart would support export of traces (also maybe logs but out of scope for this ticket) towards OTEL collector.

Side note

I really like/appreciate the maturity and features the chart already has! Nice job done.

✌️