Describe the enhancement requested

Implement a skeleton for an Azure Filesystem. All functions would return Status::NotImplemented(). This will keep the future changes smaller, and allow to verify all CI builds are working in a smaller PR.

Related issues:

• [C++] Filesystem implementation for Azure Blob Storage #18014 (is a child of)
• [C++] Filesystem implementation for Azure Data Lake #25673 (potential second parent isse)

Other links:

This issue is similar to how GCSFileSystem was implemented, by having an initial issue for the skeleton: #29804

Component(s)

C++