Picodata was bumped to rust 1.71.0, so sbroad as its submodule can
finally update the rust version as well.

Implement opentelemetry instrumentation in sbroad.
How to test:

docker run --name jaeger -d --rm -p6831:6831/udp -p6832:6832/udp \
-p16686:16686 -p14268:14268 jaegertracing/all-in-one:latest

Then run a stress test with sbroad. The results would be available
at http://localhost:16686/