agent-platform release v4.129.0

Added

• (kagent) Derive connectionStringSecretRef and role beside urlFile in #978 by @teemow

Changed

• (deps) Update agentgateway line to v2.3.5 in #976 by @renovate[bot]

Fixed

• (connectivity) Keep chart version labels off the s3proxy pods in #973 by @teemow
• (connectivity) Keep chart version labels off the csi-companion pods in #975 by @teemow

Full Changelog: https://github.com/giantswarm/agent-platform/compare/v4.128.0...v4.129.0