Update Workhorse to v8.14.0
What does this MR do?
Upstream version of !18391 (closed) since CI is broken for forks the moment
Updates gitlab-workhorse to v8.14.0 from v8.12.0. More details of changes can be found in gitlab-workhorse!430 (merged) (merged) and gitlab-workhorse!432 (merged) (merged)