Add logical backup for azure

[stgrace]

This PR adds support for logical backups to be pushed to Azure

In the backup script used to create a logical backup and push to cloud, I had to temporarily write the logical backup to a file in tmp, because Azure's cli cannot by upload data from stdin to a file in a storage account. There is an extension that can do so, but this extension only works with strings, and fails when you pipe the result of the compress to it. (https://github.com/Azure/azure-cli-extensions/blob/main/src/storage-blob-preview/azext_storage_blob_preview/_help.py#L172)

[rgarcia89]

I would love to see this merged

[FxKu]

:+1:

[idanovinda]

👍