Adding tracing related tests

[ppatierno]

Since the OpenTracing support, we have never had proper tests for tracing.
With the latest OpenTelemetry addition, we have got this ones here https://github.com/strimzi/strimzi-kafka-bridge/tree/main/src/test/java/io/strimzi/kafka/bridge/tracing but anyway these tests just run clients to send and receive messages without checking that tracing information are available. They just check that messages are properly exchanged when tracing is enabled but nothing more.
We should explore a way to check that expected spans are created and tracing information are available.

[im-konge]

As part of refactoring that I'm currently doing, I removed the tracing package with the current tracing tests, because they didn't tested anything else in comparison to other tests. Also, there was just one smoke test that required external Bridge running in order to run it. There was just check for sending and receiving messages without any OTel related checks.

With removed Vert.X from the integration tests and different setup of the testcases, I think we are now able to configure the Bridge more and do more things around tracing. So once the whole refactor will be finished, this issue will be un-blocked.