Backport #33543
In the old `pickTask`, when getting secrets or variables failed, the
task could get stuck in the `running` status (task status is `running`
but the runner did not fetch the task). To fix this issue, these steps
should be in one transaction.
---------
Co-authored-by: Zettat123 <zettat123@gmail.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
