Release script blows up on missing upstream git remote

[bevacqua]

You have to continue manually, because by that point the release script has done a ton of stuff, so "trying again" just doesn't cut it. It'd be best to short circuit with a check at the beginning.

Also docs-sync doesn't seem to output anything, it should stream output from the execSync calls like release script does. Currently, it buffers it and then flushes once the scripts ended.

[github-actions]

👋 Hey there. This issue hasn't had any activity for 180 days. We'll automatically close it if that trend continues for another week. If you feel this issue is still valid and needs attention please let us know with a comment.

[github-actions]

❌ We're automatically closing this issue due to lack of activity. Please comment if you feel this was done in error.

[cee-chen]

Resolved by #6528