[Pipelines] Private Agent in VNET

[mathieu-benoit]

• https://github.com/microsoft/azure-pipelines-ephemeral-agents
• https://github.com/gambtho/aks-azuredevops-agent
• https://www.henrybeen.nl/fully-isolated-private-agents-for-azure-pipelines-in-azure-container-instances/
• https://github.com/microsoft/azure-pipelines-agent/blob/master/docs/design/byos.md
• https://juliocasal.com/2020/01/14/deploying-azure-pipelines-agents-as-containers-to-kubernetes/

[mathieu-benoit]

Done with the blog article below and the Private cluster implementation #60

https://alwaysupalwayson.blogspot.com/2020/02/azure-pipelines-agent.html