Merge branch 'update-sidekiq-cluster-cli-spec' into 'master'

Make Sidekiq Cluster CLI spec more meaningful

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/108986



Merged-by: Jan Provaznik <jprovaznik@gitlab.com>
Approved-by: Jan Provaznik <jprovaznik@gitlab.com>
Co-authored-by: Sean McGivern <sean@gitlab.com>