ManagedIdentityCredential retry policy should handle 410 status response

DefaultAzureCredentialImdsRetryPolicy should delay for long enough so that the exponential retry total duration is at least 70 seconds in the event that the response code is 410.

[See the docs](https://learn.microsoft.com/en-us/azure/virtual-machines/instance-metadata-service?tabs=windows#errors-and-debugging) for more info on 410 status code