[Object Storage]: Collect and export actual cost data for Azure object storage

[Pokom]

When we initially started cloudcost-exporter, our focus was on GCP and then AWS with Azure as a very far distant priority. Before we go live with cloudcost-exporter we should implement exporting Azure Object Storage costs.

[grafanabot]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contribution.

[jjo]

Possibly happening in Q3 together with compute metrics effort on Azure, depending on #140127.

[Duologic]

considering #140127 is done, unblock

[Pokom]

This is a good first issue for someone that would want to learn more about how to build a collector from scratch that isn't time sensitive. I've added appropriate labels and will update the issue with appropriate documentation and requirements.