* Improve kafka tracing
* Update KafkaProducerAspect to use shorter operation names
* Update CoroutineBacktraceHelper.php
* Fix issue with TracingKafkaListener
* Refactor KafkaProducerAspect to support async sending
* Finish span after processing in KafkaProducerAspect
* Refactor KafkaProducerAspect to include class and method names in span names
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Co-authored-by: Deeka Wong <8337659+huangdijia@users.noreply.github.com>