maintainer PRs still require manual approval of workflow

[ludfjig]

Copilot reviews trigger the Ready-for-review (collect) workflow. GitHub treats Copilot as an external actor, so our all_external_contributors policy requires approval.

This leaves an approval warning on maintainer PRs. PR #1723 and run 31618809389 show the issue.

Job conditions do not help because approval happens first. Or we can remove copilot reviews entirely

[ludfjig]

perhaps https://github.blog/changelog/2026-03-13-optionally-skip-approval-for-copilot-coding-agent-actions-workflows/ helps?