Integrate 2 new features from upstream
- Enable gzip of znode data to help circumvent ZK's 1MB znode data size (https://github.com/tarvip/kafkakit-prometheus-metricsfetcher/pull/3)
- Allow the passing of arguments via environment variables (https://github.com/tarvip/kafkakit-prometheus-metricsfetcher/pull/4)
Bug: T349393
Edited by Brouberol