It uses Azure SDK to connect to Azure storage, creates a container there
and uploads the image. Unfortunately the API for page blobs does not
include some thread pool for upload so I implemented one myself. The
performance can be tweaked using the upload chunk size and number of
parallel threads.
The package is prepared to be refactored into common module within
internals package as soon as we agree on the of these common packages
for image upload.
Add azure-blob-storage rpm package as a dependency
It didn't work for me using the `golang(package)` syntax. Using the
package name explicitly works.
Add two kinds of tests, with one case each:
1. Run image-info against an osbuild pipeline. Uses osbuild
from a submodule to make an image from the pipeline.
2. Run image-info against an existing image, fetched from the internet.
