agent-platform release v4.28.7

Changed

• (verify-target) Drop the golden-side klausGateway.crd hold — origin/main carries #497, so nulling the key there inserted crd: null and made the meta default render drift in #501 by @fiunchinho

Full Changelog: https://github.com/giantswarm/agent-platform/compare/v4.28.6...v4.28.7