net/traefik: Update to upstream release 3.2.1

Details:

• Move traefik to the 3.2 branch, release details see: https://github.com/traefik/traefik/releases/tag/v3.2.1
• The breaking config changes between the previous 3.1 and 3.2 are mostly limited to Kubernetes, see: https://doc.traefik.io/traefik/migration/v3/#v31-to-v32

MFH: 2024Q4