Log MSAL events to debug stream

[peombwa]

Fixes #2035 by ensuring we write to PowerShell's debug stream on Connect-MgGraph -Debug:

➜ Connect-MgGraph -TenantId "thisdomaindoesnotexist.com" -UseDeviceAuthentication -Debug -ErrorAction SilentlyContinue
DEBUG: DeviceCodeCredential.Authenticate invoked. Scopes: [ User.Read ] ParentRequestId:
DEBUG: False MSAL 4.51.0.0 MSAL.NetCore .NET 7.0.5 Microsoft Windows 10.0.22621 [2023-05-25 00:10:59Z - 23771621-a234-4bbe-a286-fcd02e5568b2] MSAL MSAL.NetCore with assembly version '4.51.0.0'. CorrelationId(23771621-a234-4bbe-a286-fcd02e5568b2)
DEBUG: False MSAL 4.51.0.0 MSAL.NetCore .NET 7.0.5 Microsoft Windows 10.0.22621 [2023-05-25 00:10:59Z - 23771621-a234-4bbe-a286-fcd02e5568b2]
=== Request Data ===
Authority Provided? - True
Scopes - User.Read
Extra Query Params Keys (space separated) -
ApiId - AcquireTokenByDeviceCode
IsConfidentialClient - False
SendX5C - False
LoginHint ? False
IsBrokerConfigured - False
HomeAccountId - False
CorrelationId - 23771621-a234-4bbe-a286-fcd02e5568b2
UserAssertion set: False
LongRunningOboCacheKey set: False
Region configured:

DEBUG: False MSAL 4.51.0.0 MSAL.NetCore .NET 7.0.5 Microsoft Windows 10.0.22621 [2023-05-25 00:10:59Z - 23771621-a234-4bbe-a286-fcd02e5568b2] === Token Acquisition (DeviceCodeRequest) started:
         Scopes: User.Read
        Authority Host: login.microsoftonline.com
DEBUG: False MSAL 4.51.0.0 MSAL.NetCore .NET 7.0.5 Microsoft Windows 10.0.22621 [2023-05-25 00:10:59Z - 23771621-a234-4bbe-a286-fcd02e5568b2] [Instance Discovery] Instance discovery is enabled and will be performed
DEBUG: False MSAL 4.51.0.0 MSAL.NetCore .NET 7.0.5 Microsoft Windows 10.0.22621 [2023-05-25 00:10:59Z - 23771621-a234-4bbe-a286-fcd02e5568b2] [Region discovery] Not using a regional authority.
DEBUG: Request [a1a5a74a-b374-4c3c-9155-2693a0265c3d] POST https://login.microsoftonline.com/thisdomaindoesnotexist.com/oauth2/v2.0/devicecode

Changes proposed in this pull request

• Adds AzureEventSourceListener from Azure.Identity library to write MSAL logs to PowerShell's debug stream.
• Adds Pester test to validate the change.

Other links

• https://github.com/Azure/azure-sdk-for-net/tree/main/sdk/identity/Azure.Identity#logging
• https://github.com/AzureAD/microsoft-authentication-library-for-dotnet/wiki/logging