Allow anyone with WebKit committer or reviewer status to stop ongoing EWS builds.
Pull request: https://github.com/WebKit/WebKit/pull/11515
Committed 261654@main (41f47a0b64bd): <https://commits.webkit.org/261654@main> Reviewed commits have been landed. Closing PR #11515 and removing active labels.
<rdar://problem/106724631>
This is deployed and seems to be working fine.