Upgrade to kubectl 1.27

From Draft to Ready

• gitlab-org/gitlab-build-images!807 (merged) is merged

Context

Follow-up of !2801 (merged)

What does this MR do and why?

Upgrade kubectl to version 1.27, as the cluster is already at version 1.27.

Expected impact & dry-runs

None: we should still be able to deploy triage-ops.

Action items

• If adding environment variables for reactive processors, update config/triage-web.yaml and .gitlab/ci/triage-web.yml
• (If applicable) Add documentation to the handbook pages for Triage Operations =>
• (If applicable) Identify the affected groups and how to communicate to them:
  • /cc @person_or_group =>
  • Relevant Slack channels =>
  • Engineering week-in-review