[Feature Request] 'az pipelines runs artifact download' show download progress

When using 'az pipelines runs artifact download' on large files it can be confusing if the call has failed etc since there's no status except for "Downloading...".

Since the download call is synchronous (to the end user at least) easiest fix would just be to just update the output message.

Another way might be to add a '--async' option and a way to query the download progress in a loop.