Merge branch 'tchu-fix-rubocop-offenses-for-reindexing-models' into 'master'

Fix rubocop offenses for Elastic::ReindexingTask model

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/170519



Merged-by: Terri Chu <tchu@gitlab.com>
Approved-by: Jack Chapman <jachapman@gitlab.com>
Approved-by: Brian Williams <bwilliams@gitlab.com>
Approved-by: Madelein van Niekerk <mvanniekerk@gitlab.com>
Reviewed-by: Terri Chu <tchu@gitlab.com>
Reviewed-by: Brian Williams <bwilliams@gitlab.com>
Reviewed-by: Madelein van Niekerk <mvanniekerk@gitlab.com>