[Storage] Check if inherited methods (from abstrac_storage) respect the retries

[rzvoncek]

Project board link

Sometimes at tests we still get random errors at places like gcs_storage._upload_blob(). This mehtod does have a retry on it. It's not clear if the error bubling up actually wenth through the retries or the retry annotation is not effective.

During a refactoring week, it'd be great to see how this precisely works.

In the worst case, we need to make sure all the retries are working properly.

┆Issue is synchronized with this Jira Story by Unito ┆Issue Number: MED-22