Bump workhorse to 8.53.0
What does this MR do?
There are a number of unreleased changes in Workhorse esp. around image scaling metrics that I would like to get into prod:
https://gitlab.com/gitlab-org/gitlab-workhorse/-/tags/v8.53.0
## v8.53.0
### Added
- Add route for Debian package uploads
https://gitlab.com/gitlab-org/gitlab-workhorse/-/merge_requests/610
Contributed by Mathieu Parent
### Fixed
- Don't log image scaler fail-overs as successes
https://gitlab.com/gitlab-org/gitlab-workhorse/-/merge_requests/636
### Other
- Exclude dot-files from "make fmt" target
https://gitlab.com/gitlab-org/gitlab-workhorse/-/merge_requests/641
- Add max_processes Prometheus metric for image scaling
https://gitlab.com/gitlab-org/gitlab-workhorse/-/merge_requests/640
- Simplify config handling in main()
https://gitlab.com/gitlab-org/gitlab-workhorse/-/merge_requests/634
- Default MaxScalerProcs to num_cores / 2
https://gitlab.com/gitlab-org/gitlab-workhorse/-/merge_requests/635
- Add a total requests metric for image scaling
https://gitlab.com/gitlab-org/gitlab-workhorse/-/merge_requests/638
Does this MR meet the acceptance criteria?
Conformity
Edited by Matthias Käppler