backstage release v3.29.0

Added

• (gs) Add Gateways tab to the cluster detail page in #2706 by @weatherhog

Changed

• Run node-build’s tests on two containers in #3330 by @fiunchinho

Fixed

• (agent-platform) Refuse an answer to a request the task no longer asks in #3331 by @QuentinBisson

Full Changelog: https://github.com/giantswarm/backstage/compare/v3.28.3...v3.29.0