Update to newer az structure.

[isaacabraham]

This PR closes #1141

The changes in this PR are as follows:

• Use updated JSON structure for AZ.
• Refactor code a little (readability)

I have read the contributing guidelines and have completed the following:

• Tested my code end-to-end against a live Azure subscription.
• Updated the documentation in the docs folder for the affected changes.
• Written unit tests against the modified code that I have made.
• Updated the release notes with a new entry for this PR.
• Checked the coding standards outlined in the contributions guide and ensured my code adheres to them.

If I haven't completed any of the tasks above, I include the reasons why here:

• No tests - end-to-end feature.

Below is a minimal example configuration that includes the new features, which can be used to deploy to Azure:

let users = AccessPolicy.findUsers [ "[email protected]" ]
let groups = AccessPolicy.findGroups [ "a-group-in-entra" ]

[ninjarobot]

Should this have a test of what the expected output would be given some JSON from a search response?