Improve Community Contribution MR velocity
Ideas to help speed this up include
- [x] Tighten the feedback loop for stale MRs notification.
- Reduce this to 1 month https://gitlab.com/gitlab-org/quality/triage-ops/blob/master/.triage-policies.yml#L387
- [x] Implement triage package for community MRs
- https://gitlab.com/gitlab-org/quality/triage-ops/issues/1
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