Merge branch 'mg-remove-sidekiq-min-max-concurrency' into 'master'

Remove min and max_concurrency option in Sidekiq cluster

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/149690



Merged-by: Sylvester Chin <schin@gitlab.com>
Approved-by: Josianne Hyson <jhyson@gitlab.com>
Approved-by: Sylvester Chin <schin@gitlab.com>
Reviewed-by: Josianne Hyson <jhyson@gitlab.com>
Co-authored-by: Gregorius Marco <gmarco@gitlab.com>