Authenticate with Azure Ad for Provider AZURE_BLOBS

## Feature Request
Add the ability to authenticate Azure Blob Storage Accounts via Azure AD service principal secrets and certificates.
This feature would be following this feature from jclouds (https://issues.apache.org/jira/browse/JCLOUDS-1558)
It would be using the rest api to access azure ad

For more information on contributing, please see https://libcloud.readthedocs.io/en/latest/development.html

Start with the AZURE_BLOBS provider and the referenced jclouds JCLOUDS-1558 feature, then review the libcloud development guide. Define the Azure AD REST API flow for service principal secrets and certificates; the work is done when Azure Blob Storage accounts can authenticate through both credential types.

Written by the indexing model from the issue text.