Review and replace "Losing the whole cluster" runbook

[AntonyBishop]

Background

Tidy up of DR Runbooks that no longer apply following migration to EKS.

Review Losing the whole cluster

We need to replace this section of the runbooks following the migration to EKS. There is still value in this runbook however it need to be relevant to EKS.

Story will require testing of process.

Definition of done

• [ ] Recovery plan tested
• [ ] Runbook updated

Reference

How to write good user stories