Distributed Tracing: Producer OpenTelemetry instrumentation

[fedeoliv]

This PR introduces a distributed tracing instrumentation for the Producer by leveraging the use of Activity objects with tags mapping the OpenTelemetry messaging attributes specification.

The implementation is inspired by the great discussion on issue #1269 and the @CodeBlanch's proposal on the PR #1278.

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[fedeoliv]

@mhowlett I'd love your feedback on this implementation proposal 😊

[mhowlett]

i'd love to have time to give it to you.. i'll ping product about this feature.

[CodeBlanch]

Thanks for this @fedeoliv! I did a quick review and left some comments about where we are with the spec, etc. Happy to help out however I can.

[chertby]

Does it look like development has stopped? If there's time pressure, I could try to continue if @fedeoliv don't mind?

[Juandavi1]

@mhowlett It's been 5 months, is there any update on whether and how Kafka is going to support distributed tracing?

[sookeke]

Folks, any update on this? it's been months @mhowlett

[iiwaasnet]

Is context propagation implemented as well? Maybe I missed it, but I can't find any code using propagator.Inject()/propagator.ExtractTraceIdAndState()...

[GiorgioG]

Can we get an update?

[smurariu]

@anchitj any news on this?