scout/advise: first iteration of the src scout advise subcommand

[jasonhawkharris]

Refactor

• create a universal config object for the scout tool
• before, each subcommand had its own config type
• add kube package for repetitive kubernetes actions across sub commands

First iteration of scout advise

• scout advise gives recommendations for resources allocations based on current usage

Test plan

Ships with unit tests. Manually tested on healthy and unhealthy instances of sourcegraph (k8s and Docker).

[jasonhawkharris]

video: src scout advise --namespace ns-sourcegraph --pod gitserver-0
https://github.com/sourcegraph/src-cli/assets/62355966/a3875a98-d856-454e-9919-ae7d28d2555c

[jdpleiness]

I am having some issues trying this out with a local Helm deployment running in Kind. Am I missing something?

[jasonhawkharris]

I have tested this on
✅ Minikube
✅ GCP GKE
✅ AWS AMI
❌ Kind

I believe that something is happening with Kind, but I have doubts about any of our customers that would use scout would need it to work in a k8s testing environment like Kind. Since it is working in the other deployments, I think this should be merged.

[jdpleiness]

Looks good with the new testing.