Add fluentd-elasticsearch service
What
Add fluentd-elasticsearch service, moved from https://gitlab.com/gitlab-com/gl-infra/k8s-workloads/tanka-deployments
CR: gitlab-com/gl-infra/production#20700 (closed)
Why
Issue: gitlab-com/gl-infra/production-engineering#27484 (closed)
Edited by Pierre Guinoiseau