Adoption of cloud-native (Kubernetes-specific) technologies

Currently, pfcon uses the Kubernetes Job API "naively" meaning it creates and deletes Job resources directly. Higher-level add-on APIs which are highly prevalent in the k8s ecosystem include:

- [Tekton](https://tekton.dev) pipelines
- Could be more efficient and/or better integrated than using _ChRIS_ backend to orchestrate DAG execution
- [Kueue](https://kueue.sigs.k8s.io/)
- Shared HPC features e.g. gang scheduling, fair share
- May be part of a platform's fulfillment to [Kubernetes AI Conformance](https://github.com/kubernetes-sigs/ai-conformance)

Using these higher-level APIs instead of directly creating/deleting jobs could be advantageous.