feat(chart)!: major update of dependencies on traefik chart

[github-actions]

🤖 I have updated the chart beep boop

Description of the changes

This PR updates the dependencies of the traefik Helm chart.

⚠️ This was a major update! Please check the changelog of the updated dependencies and take notice of any breaking changes before merging. ⚠️

[lentidas]

Ever since our latest upgrade, there have been multiple breaking changes:

• v26.1.0 -> v27.0.0:

  • if you were overriding port exposure behavior using the expose or exposeInternal flags, you should replace them with a service name to boolean mapping (check the official changelog for an example).
  • if you were previously using the service.internal value, you should migrate the values to the service.additionalServices.internal value instead; this should yield the same results, but make sure to carefully check for any changes!
  • resources that use the traefik.containo.us are definitely no longer supported; the other modules of the DevOps Stack have already been migrated, but make sure you make the changes on your side.

• v27.0.2 -> v28.0.0:

  • multiple CRDs have been updated but the users of the DevOps Stack do not need to update them manually since Argo CD takes care of it;
  • the upstream team added the first experimental support for Traefik v3; a migration guide for your resources is available here;
  • this upgrade also introduces support to OpenTelemetry; although this is not a breaking change, it is noteworthy;

• v28.3.0 -> v29.0.0:

  • there is change in the values that affects the way we activate the ServiceMonitor for Prometheus; we can now use an attribute enabled to activate it; see here;
  • Kubernetes Gateway support is no longer experimental;
  • the IngressRoute for the Traefik Dashboard is now disabled by default.

[lentidas]

Tested an upgrade in place with SKS and EKS clusters without any issues.