Merge branch 'remove-sidekiq-standalone-references' into 'master'

Remove Sidekiq standalone references from systemd examples

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/97694



Merged-by: Mehmet Emin INAC <minac@gitlab.com>
Approved-by: DJ Mountney <dj@gitlab.com>
Approved-by: Mehmet Emin INAC <minac@gitlab.com>
Reviewed-by: Jörg Behrmann <behrmann@physik.fu-berlin.de>
Co-authored-by: Sean McGivern <sean@gitlab.com>