docs: Add a guide for running airbyte workloads on custom nodes

[chrishronek]

Summary

If your customers want to run Airbyte workloads on a specific node type, this should get them started.

Test Plan

I'm using the documented configuration on my plural.sh hosted Airbyte and it's working great.

Checklist

• [x] No images hosted from dockerhub
• [x] Are dashboards present to understand the health of the application. There must be at least 1 of these
  • [x] all databases should have dashboards
  • [x] ideally also have at least cpu/mem utilization dashboards for webserver tier of the app
  • [x] you can use plural from-grafana to convert a grafana dashboard found via google to our CRD
• [x] Are scaling runbooks present
  • [x] all databases must have scaling runbooks
  • [x] you can use the charts in pluralsh/module-library to accelerate this
• [x] do you need to add config overlays?
  • [x] inputing secrets
  • [x] configuring autoscaling
• [x] If there’s a web-facing component to the app, we need to support OIDC authentication and setting up private networks if no authentication option is viable
• [x] All major clouds must be supported
  • [x] Azure
  • [x] AWS
  • [x] GCP

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Checklist isn't very applicable because it's a simple doc add. Let me know if I missed anything 🍻

[plural-bot]

:tada: This PR is included in version 1.2.2 :tada:

The release is available on GitHub release

Your semantic-release bot :package::rocket: