[Eng]: Support for NuGet tooling when using Ubuntu 24.04 hosted agents

### Description

Scenario

Our pipelines upgraded from ubuntu-22.04 to ubuntu-24.04 Microsoft-hosted agents.

On 24.04, mono is no longer included, which breaks tasks that depend on nuget.exe (specifically NuGetCommand@2).

This PR applied a temp fix: https://github.com/Azure/azure-powershell/pull/28611

Azure PowerShell build/test pipelines are affected since they invoke nuget.exe under the hood.

Expected

Migration of the build infra to supported alternatives (e.g., NuGetAuthenticate@1 with .NET CLI).

Impact

More robust solution that the temp fix currently applied, this is Microsoft's guidance on dealing with `mono` issue going forward.

References

[Microsoft-hosted agent images announcement](https://learn.microsoft.com/en-us/azure/devops/pipelines/tasks/reference/nuget-command-v2?view=azure-pipelines&tabs=windows#support-for-newer-ubuntu-hosted-images)

.