alertmanager: attempt to deploy rancher-monitoring with an helm chart
(MR for the record to track this attempt.)
- CRDs had to be installed before chart (use crds directory) Helm doesn't managed order between the charts and their dependencies.
- Application namespaces need to be overriden or explicitly declared on helm command line arguments to activate the monitoring application in Rancher. So this won't run in ArgoCD.
Related to swh/infra/sysadm-environment#5018 (closed)