Migration policy for CI variable resources round 2

What does this MR do and why?

Addresses one remaining migration to cleanup resources labeled with CI variables , Category:Pipeline Composition and grouppipeline authoring by changing the labels to CI variables grouppipeline security

closes #1254 (closed)

Expected impact & dry-runs

https://gitlab.com/gitlab-org/quality/triage-ops/-/jobs/3933202187

The expected result is to remove the following resources

• 201 issues
• 1 MRs
• 2 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