Context:
With OPT-4264 a readiness endpoint was introduced to the rest api of Optimize which allows to track whether an Optimize container is in an operating state, also see https://docs.camunda.org/optimize/latest/technical-guide/rest-api/health/.

AT:

• all existing k8s deployement descriptors used for test environments should make use of this endpoint for `readiness/liveness` probes https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/
• on instabilities are ideally alerts sent to #optimize-ci-alerts on slack so we are aware of them