The test deployment hides errors

[AlexanderSehr]

The Test-AzDeployment invocation in the pipeline does not display the actual error which should be improved. Instead you get e.g.

  "Code": "InvalidTemplateDeployment",
  "Message": "The template deployment '63cf1c49-0691-4019-bc26-50e8c7a94273' is not valid according to the validation procedure. The tracking id is '7d823c4b-b602-45df-8757-4b8fb07a4acd'. See inner errors for details.",
  "Target": null,
  "Details": [
    {
      "Code": "PreflightValidationCheckFailed",
      "Message": "Preflight validation failed. Please refer to the details for the specific errors.",
      "Target": null,
      "Details": "Microsoft.Azure.Commands.ResourceManager.Cmdlets.SdkModels.PSResourceManagerError"
    }
  ]
}