TK-65403 disable custom rest backend

[drewwells]

TK-65403 disable custom rest backend

- custom rest does not register any resource verbs kubernetes-sigs/apiserver-builder-alpha#551
- template etcd variables
- use temp dir by default
- test example apiserver in PR build

DEMO

k apply -f sample/contact.yaml                                  
contact.example.infoblox.com/contact-example created
k get contact                                                   
NAME              CREATED AT
contact-example   2020-10-25T03:35:23Z

[kd7lxl]

You could run your demo around this point of the e2e test:

konk/.github/workflows/pr.yaml

Line 69 in a2abc8a

kubectl exec -it $POD_NAME -- kubectl get crd appconfigs.stable.example.com websites.extensions.example.com

[drewwells]

Added a PR step that verified contact CR can be created. The helm chart exists --wait without the API Service actually being up. This is disappointing. The until retries will ensure actions can be performed.

https://github.com/infobloxopen/konk/pull/48/checks

[kd7lxl]

This creates the APIServer outside of konk, so what's the point? We want to prove it works inside konk.