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

从 AZURE_BLOBS provider 和所引用的 jclouds JCLOUDS-1558 功能开始，然后查阅 libcloud 开发指南。定义用于 service principal secret 和 certificate 的 Azure AD REST API 流程；当 Azure Blob Storage 账户能够通过这两种 credential 类型进行身份验证时，工作即完成。

由索引模型根据 Issue 内容生成。