Update to roadmap -Add Open Telemetry to Distributed Tracing

[Paraplegix]

In the Logging -> Distributed Tracing branch, Open Telemetry should be added alongside Jaeger

https://opentelemetry.io/docs/

From their doc : OpenTelemetry is a set of APIs, SDKs, tooling and integrations that are designed for the creation and management of telemetry data such as traces, metrics, and logs. The OpenTelemetry documentation is intended to broadly cover key terms, concepts, and instructions on how to use OpenTelemetry in your software.

They provide library for instrumentation and have the advantage to have implementation in multiple language which help in maintaining application in heterogeneous environments

Jaeger is also planning to get a closer integration with Open Telemetry (see https://www.jaegertracing.io/docs/1.21/opentelemetry/ )