agent-platform release v4.10.3

Changed

• (kagent) Re-pin to Substrate v0.0.27-gs.9 / kagent v0.11.0-gs.12 — a superseded template’s crashed golden actor is collected and frees its worker in #435 by @teemow

Full Changelog: https://github.com/giantswarm/agent-platform/compare/v4.10.2...v4.10.3