net/traefik: Update to upstream release 3.1.4

Details:

• Update the traefik port to the 3.x branch. The details for this release can be found at: https://github.com/traefik/traefik/releases/tag/v3.1.4
• The authors made sure that most of the settings are identical, hence the v3 branch of traefik will accept configuration files without any changes in most of the cases. For edge cases, the migration guide at https://doc.traefik.io/traefik/migration/v2-to-v3/ explains the way forward.