Add helm hooks to run `ngrok diagnose` to check the network for connectivity

[alex-bezek]

Description

ngrok can sometimes be blocked by corporate firewalls https://ngrok.com/docs/guides/other-guides/running-behind-firewalls/
We can have people test their connection when we see they have specific errors in their logs, but it would be nice if the helm chart could test this for you when installing it.

You can run the diagnose command in the ngrok agent container easily like this

apiVersion: batch/v1
kind: Job
metadata:
  name: ngrok-diagnose
spec:
  template:
    spec:
      containers:
        - name: ngrok-diagnose
          image: ngrok/ngrok:latest
          command: ["/bin/sh", "-c"]
          args: ["ngrok diagnose"]
      restartPolicy: Never

We should include this as a helm pre-install and pre-upgrade hooks as well as a helm test that could then be ran ad-hoc via helm test ngrok-operator

Use Case

Inform users quickly of a specific network issue rather than them installing it and having to debug the logs to find network errors

Related issues

No response

[jonstacks]

This feels like a great first step. Yes, and....we should get something added long term which has ngrok network checks as a first class citizen and does them periodically as DNS and network segments can have intermittent issues.

[alex-bezek]

This feels like a great first step. Yes, and....we should get something added long term which has ngrok network checks as a first class citizen and does them periodically as DNS and network segments can have intermittent issues.

Yeah, are you thinking something like ngrok-go has functions available for these checks that we can then wire up to the operator's readiness probe?