In addition to add support for multi-hashes (T2309), we will need to use more advanced
features of the Azure Blob Storage, so using only mock-based tests will be
less reliable.
This commit adds the option to run the test suite with Azurite, a clone
of the Azure Blob Storage API, which is a standard tool used in tests.
See https://learn.microsoft.com/en-us/azure/storage/common/storage-use-azurite