The upstream and rebuild syncs push with GITHUB_TOKEN, so GitHub holds
their build and test runs for approval. Their approve job only released
those runs once a maintainer had applied build-approved, and never ran
for the push that opened the PR, so every sync PR sat waiting.
The sync now labels its own PR build-approved, and the approve job runs
for created PRs as well as updated ones.
Ryan Hughes
5fb29fe547