Prepare 17.9.8 release for cng-jh
Release issue: https://jihulab.com/gitlab-cn/release/tasks/-/issues/323
Summary
This MR prepares 17-9-stable-jh for 17.9.8.
Automated cherry-picking
Merge requests labeled ~"Pick into 17.9" should be automatically picked into this MR.
Manual intervention
If merge requests cannot be picked automatically they have to be created
manually targeting 17-9-stable-jh-patch-8.
See also Patch Releases documentation.