rework K8s deployment workflow
- Update image names in Helmfile files during the image build+push phase. This leaves a Helmfile configuration ready to be deployed when using flag
--stop-before-sync
- Do not perform unnecessary deployments to K8s cluster if the build+push phase failed
- Add
--k8s-only
tosync-world
to allow deploying to the K8s cluster only, without syncing to the regular Apache targets