Multiple confluent-kafka instrumentation issues

[oleksii-valuiskyi]

1. Producer does not support suppression logic
   Fixed add suppression logic to confluent-kafka #1960

2. ConsumerProxy and ProducerProxy don't implement all methods from the base classes
   Fixed add missing methods to ProxyConsumer and ProxyProducer #1965

3. Not correct semantic conventions for Producer and Consumer
   Fixed improve semantic conventions for confluent kafka producer #1966

4. Metrics are not implemented for Producer and Consumer

5. Not correct extraction of remote context for Consumer

Related confluent-kafka issues and PRs

• ProxiedConsumer is creating spans each time it polls instead of only when it receives a message #1674
• Confluent kafka instrumentation doesn't define instrumentation and semconv dependencies #1894
• Make sure confluent-kafka instrumentation follows semantic conventions #1641
• Create span only after record is received while polling #1678
• Define messaging metrics and add error.type attribute to spans semantic-conventions#163
• new kafka brokers metrics added semantic-conventions#113

Related docs

• https://github.com/open-telemetry/semantic-conventions/blob/main/docs/messaging/messaging-spans.md
• https://github.com/open-telemetry/semantic-conventions/blob/main/docs/messaging/kafka.md