Replace shared librdkafka with its binary

[hapnermw]

Description

confluent-kafka-go-dev provides a nice Go API for Kafka; however, making it dependent on a shared lib is a fundamental design error that contradicts a primary design goal of Go - fully resolved binaries. This can easily be resolved. Replace this dependency on the various forms of the librdkafka shared library with its binary. confluent-kafka-go-dev dependence on the librdkafka is a poster-child for why Go took the fundamental step of eliminating the use of shared libraries. Re-introducing such a dependency via the ‘backdoor’ of cgo was a poor design decision that should be rectified asap. This decision has lead to a number of easily avoidable issues. For instance, having to document the installation of librdkafka-dev that is now fundamentally broken on Ubuntu. Also, the fact that Kafka clients built with confluent-kafka-go-dev require the use of a compatible linux Docker container base image and don’t support either the Docker scratch image or the alpine base image. Please fix this!

How to reproduce

N/A

Checklist

Please provide the following information:

• [X] confluent-kafka-go and librdkafka version (LibraryVersion()):
• [ ] Apache Kafka broker version:
• [ ] Client configuration: ConfigMap{...}
• [ ] Operating system:
• [ ] Provide client logs (with "debug": ".." as necessary)
• [ ] Provide broker log excerpts
• [ ] Critical issue

[nsubramanya-ns]

@edenhill, Please can you comment on when this fork will be mainlined/merged to github.com/confluentinc/confluent-kafka-go or when this issue will be fixed. Thanks