Users of Azure Blob storage, particularly those using Azure China, Azure
Germany, or Azure Government, may need to customize the Azure
endpoint. To support this, we add a custom Azure URL opener that
supports the `domain` query parameter. This work has been submitted
upstream: https://github.com/google/go-cloud/pull/2851/files

Documentation for using Azure Blob storage:
https://gitlab.com/gitlab-org/gitlab/-/merge_requests/40693.