[BUG] AzureEnvironment needs to move away from AAD Graph

[Bpoe]

AzureEnvironment is still using AAD Graph (graph.windows.net). This needs to be migrated to MS Graph.

https://learn.microsoft.com/en-us/graph/migrate-azure-ad-graph-request-differences#basic-requests

[weidongxu-microsoft]

The lib was deprecated last year. Please migrate to https://aka.ms/azsdk/dotnet/mgmt