OpenTelemtry for metrics

[magick93]

Description

We have a few open issues that are related:

• Metrics #42
• Logging #30

OpenTelemetry (abbr: OTel) provides a vendor agnostic, widely adopted solution.

While we use Prometheus / Grafana we should provide a telemetry implementation that allows users to use their preferred logging / tracing / metrics stack.

OTel has the following exporters - https://github.com/open-telemetry/opentelemetry-collector-contrib/tree/main/exporter

DX

While there is mature rust support there doesnt appear to be good macro support yet.
open-telemetry/opentelemetry-rust#1879