Show Kubernetes HTTP response code

Problem to solve

If there is an error while installing Gitlab managed apps, users only see :

Kubernetes Error

We cannot show the full response due to security issues unfortunately

Further details

(Include use cases, benefits, and/or goals)

Proposal

Show the Kubernetes HTTP response code

What does success look like, and how can we measure that?

(If no way to measure success, link to an issue that will implement a way to measure this)

Links / references

https://github.com/abonas/kubeclient/blob/master/lib/kubeclient/http_error.rb