k8s-stg/night: Automate nightly builds for nri-kubernetes about nri-kubernetes

[invidian]

Deprecate infrastructure-k8s and bundle nri-kubernetes in the infrastructure bundle, thus reusing the logic already present there

I'm not sure about the deadline, but this option seems much more reasonable than the first one.

[roobre]

This was my personal favorite as well :)

However there are some extra challenges in there, as we'd need to:

1. Change all the helm charts to point to the new image
2. Migrate the nri-kubernetes config to v4, pe-enable it, and devise a "conditional activation" mechanism. This is a feature of the agent that ensures that the integration only runs when certain conditions are met. Typically an env var is used.
3. Incorporate the "unprivileged" logic, or a similar thing, into the infrastructure-bundle Dockerfile. Not impossible either but a bit convoluted.
4. Modify the infrastructure-bundle pipelines so they release the unprivileged images.

I think this is all doable in reasonable time but would require a bit more time than copypasting a pipeline.

[invidian]

Hmm, thanks for more details @roobre. Given that copying the pipeline is not really copying, but just having something similar, I think it will be easier to indeed have a separate pipeline for nightlies here for now and we can do architectural improvements at it's own pace.

I created #134 to address this issue. I think your comment should be converted enhancement issue then.