The terraform pipeline includes the SAST IaC template from GitLab which
is now redundant since mandatory CI jobs have been introduced. This
leads to [duplicate jobs][1] in some pipelines.

[1]: https://gitlab.developers.cam.ac.uk/uis/devops/
  user-notify/infrastructure/-/pipelines/840611

feat(terraform-pipeline): remove duplicate kics job

See merge request !186