Feature request: (OSS) have CLI / UI report bucket storage usage

[umaplehurst]

Proposal: It would be great if there was a way, using the UI and/or the influx CLI tool, to have the bucket list report the total storage space being used up by the bucket. I can't see anything obvious right now other than what is in the /metrics endpoint, which is not easy-to-access or user-friendly.

Current behavior: No obvious way to find out storage usage of a bucket from the existing user interfaces. Instead, have to look up the bucket ID, then go to the shell and measure storage with du (or vice-versa, one might find which bucket ID is happening to be growing excessively using du, and then do the exercise of reverse-mapping the bucket ID to a bucket name).