backstage release v3.23.0

(agent-platform) Make the Usage time window a ‘Last N days’ select by @marians — On Usage, the time window is a Time range select (Last 7, 30 or 90 days) beside the Environment select, instead of three buttons. On Your sessions, a range longer than kagent keeps is greyed out with the reason.

(agent-platform) Name an agent’s organization in the Agents list only when it has one by @marians — In Customize’s Agents list, an organization’s agent shows Organization: <name>, and agents of the platform no longer show a bare None. v3.25.0 moves the organization beside the agent’s name.
(gs) Handle a cluster being deleted on the cluster details page by @teemow — A cluster being deleted says so on its details page, shows no errors for parts already removed, updates by itself until Cluster not found, and no longer offers Delete.
(gs) Send one auth refresh per provider at a time by @teemow — The portal no longer asks you to log in again when your session is about to expire: it renews the session once in the background, also with several portal tabs open.

Full Changelog: https://github.com/giantswarm/backstage/compare/v3.22.0...v3.23.0