Tag v1.31.4 release.

Tero Saarni (4):
      Hack: semi-automate Go and Envoy updates (#7278) (#7403)
      release-1.31: Bump to go 1.24.13 (#7406)
      Post-process HTTPProxy CRD schema to remove error as a required field (#7408) (#7412)
      Update Contour Docker image to v1.31.4.

dependabot[bot] (2):
      build(deps): bump github.com/sirupsen/logrus from 1.9.3 to 1.9.4 (#7374)
      build(deps): bump the k8s-dependencies group with 4 updates (#7424)