Draft: Migrate Code Testing and Coverage and Review Apps categories to group::pipeline execution

What does this MR do and why?

Apply the following label migrations as described in #1268 (closed)

Existing	New
Category:Code Testing and Coverage grouppipeline security	Category:Code Testing and Coverage grouppipeline execution sectionops devopsverify
Category:Review Apps grouppipeline security	Category:Review Apps grouppipeline execution sectionops devopsverify

Expected impact & dry-runs

Job: https://gitlab.com/gitlab-org/quality/triage-ops/-/jobs/3908094922

impacting 350 issues, 2 MRs, 25 epics

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