net/traefik: Update to upstream version 3.5.2
Details:
- Start tracking the 3.5.x branch.
- Migration: When using proxyProtocol option for TCP LoadBalancer, a manual config change must be applied, see https://doc.traefik.io/traefik/migrate/v3/#v352
MFH: 2025Q3
(cherry picked from commit 4da322e9d0f1eb3c6d225ee482d9dad90e7e635a)