Update Gatekeeper Mutations: Removal of seccomp.security.alpha.kubernetes.io/pod in k8s 1.27

[timckt]

Background

In k8s 1.27 the previously deprecated seccomp.security.alpha.kubernetes.io/pod annotation is now inactive. We need to remove the associated gatekeeper mutation: https://github.com/ministryofjustice/cloud-platform-terraform-gatekeeper/blob/a3a7597b91ab30bc06cbb571bd313541b837d5bb/resources/mutations/annotate_seccomp.yaml

seccomp.security.alpha.kubernetes.io/pod removal reference

Proposed user journey

Approach

Which part of the user docs does this impact

Communicate changes

• [ ] post for #cloud-platform-update
• [ ] Weeknotes item
• [ ] Show the Thing/P&A All Hands/User CoP
• [ ] Announcements channel

Questions / Assumptions

Definition of done

• [ ] readme has been updated
• [ ] user docs have been updated
• [ ] another team member has reviewed
• [ ] smoke tests are green
• [ ] prepare demo for the team

Reference

How to write good user stories