Use managed identity to access Azure DevOps

[marnheus]

PAT is a way to access Azure DevOps that is currently getting less and less practical and secure to use.

In order to be more compliant with the access restrictions that are been put in place in more and more organization, the idea is to use the managed identity of the Azure Function to acces the Azure DevOps APIs.

In order to do so two things need to be updated :

• Update the CLI setup process in order to register the azure function managed identity in Azure DevOps and give it all required permissions #3
• Update the aggregator engine to use the Azure function managed identity to access Azure DevOps #4