Elastic-stack helm chart is deprecated
The Elasticsearch chart we use has a deprecation notice. https://github.com/helm/charts/tree/master/stable/elasticsearch#pre-deprecation-notice
From recent PRs on the chart, there is a clear push for us to move to the elastic maintained chart, see for example this comment from a maintainer https://github.com/helm/charts/pull/18620#issuecomment-594544661
I would like to kindly ask anyone still using this chart to migrate to https://github.com/elastic/helm-charts as this chart is deprecated and the official charts took over the project.
I will merge this PR as hotfix for those who have issues on 1.16/1.17.
We should migrate soon to ensure Gitlab users can get timely support and security fixes.
cc @dhershkovitch for scheduling