Add a configurable Grafana tag for database reindexing annotations
What does this MR do?
We previously added Grafana annotations for database reindexing. This change only adds an additional tag, so we can distinguish staging and production environments in Grafana.
See https://ops.gitlab.net/gitlab-cookbooks/chef-repo/-/merge_requests/4806 for the related config change.
In this example, we specify either GITLAB_REINDEXING_GRAFANA_TAG=gprd
or GITLAB_REINDEXING_GRAFANA_TAG=gstg
for the additional tag.
Edited by Andreas Brandl