fix: management group get after create timeout

[jaredfholgate]

Overview/Summary

Replace this with a brief description of what this Pull Request fixes, changes, etc.

This PR fixes/adds/changes/removes

1. [AVM Module Issue]: AuthorizationFailed terraform-azurerm-avm-ptn-alz#157
2. Bug: Platform Landing Zone Deployment Fails for management group permissions issues with Azure DevOps ALZ-PowerShell-Module#269

Breaking Changes

None, timeouts only

Testing Evidence

Please provide any testing evidence to show that your Pull Request works/fixes as described and planned (include screenshots, if appropriate).

As part of this Pull Request I have

• Checked for duplicate Pull Requests
• Associated it with relevant issues, for tracking and closure.
• Ensured my code/branch is up-to-date with the latest changes in the main branch
• Performed testing and provided evidence.
• Updated relevant and associated documentation.

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

[jaredfholgate]

Note the actions are failing for a transient issue with PowerShell Gallery unrelated to the code changes. They all ran successfully up until that point.