Lab Migration

[Avery-Dunn]

Migrating test infrastructure, similar to what is being done in other MSALs:
AzureAD/microsoft-authentication-library-for-java#1002
AzureAD/microsoft-authentication-library-for-dotnet#5558

This PR adjusts the way integration tests get configuration: rather than reach out to our API, it instead retrieves similar config responses from Azure Key Vault. It does using packages from Azure SDK, new helper methods, and small changes to existing tests:

• New usage of azcore and azsecrets packages to access the key vault
• New helper functions, following the same naming scheme as existing functions exception with "kV" at the start
  • The "kV" part of the name is only temporary to help compare the old behavior with the new behavior, once the conversion is done the "kV" part will be dropped and the existing API-based functions will be fully replaced or removed
• Small adjustments to existing tests to use the new behavior

Currently a draft to get an initial review and help compare the old and new systems, and will be made a full PR once all the tests are converted.

[sonarqubecloud]

Quality Gate passed

Issues
6 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud