Prepend heat map for packages

Dry-runs

• Dry-run for policies/team-triage-package.yml https://gitlab.com/gitlab-org/quality/triage-ops/-/jobs/230790094
• Dry-run for policies/stale-issues.yml https://gitlab.com/gitlab-org/quality/triage-ops/-/jobs/230790862
• Latest dry-run: https://gitlab.com/gitlab-org/quality/triage-ops/-/jobs/233752625
• https://gitlab.com/gitlab-org/quality/triage-ops/-/jobs/234990558

Follow ups

• Release a new version for gitlab-triage so we can use -r option
• #188 (closed)
• #187 (closed)

Closes #166 (closed)