OnlineIDE: Deploy a K8s resource monitoring for Theia resources

[iyannsch]

Is your feature request related to a problem?

tba

Describe the solution you'd like

Deploy a K8s resource monitoring for Theia related computation efforts. This is the first step to implement an effective scaling system and use optimizations such as container pre-warming.

Describe alternatives you've considered

tba

Additional context

This issue related to #8602

As a maintainer, I want to observe the current and past usage of Kubernetes resources due to Theia. On this basis, I want to make informed decisions regarding optimizations of the Kubernetes cluster and the execution environments.

As a developer, I want to know which parts might yield big optimization potential.

As a developer, I want to use monitoring data to regulate and optimize orchestration decisions.

[Mtze]

https://github.com/eclipsesource/theia-cloud-observability