EE: Refactor Sidekiq workers to reduce differences between CE and EE (!9215) · Merge requests · GitLab.org / GitLab · GitLab

What does this MR do?

This is the EE version of https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/24466, with all conflicts resolved. This MR excludes some of the CE specific commits, as those do not have any affect on the EE code.

What are the relevant issue numbers?

https://gitlab.com/gitlab-org/gitlab-ee/issues/8603

Does this MR meet the acceptance criteria?

Tests added for this feature/bug
Conforms to the code review guidelines
Conforms to the merge request performance guidelines
Conforms to the style guides
Conforms to the database guides
Link to e2e tests MR added if this MR has Requires e2e tests label. See the Test Planning Process.
Security reports checked/validated by reviewer