Implement longer term storage for our logs

[razvan-moj]

Background

We have 30 days of logs, and want 13 months. AWS meeting recommended implementing Warm and Cold storage for the ES cluster.

Approach

• instances we use are quite old, change to newer. Might be useful to upgrade the instance type, as storage not CPU is our main cost. (done)
• upgrade release to at least ES 7.9 (done)
• add the options of UltraWarm and Cold

Which part of the user docs does this impact

The process should be completely transparent for our users

Definition of done

• [ ] cluster upgraded
• [ ] newer instance types
• [ ] another team member has reviewed
• [ ] logs still come in
• [ ] curator job edited to cleanup after 1yr
• [ ] infra terraform code edited for the new config

Note: scope of this is not to fix the json parser, that is the topic of a separate story