In https://gitlab.com/gitlab-org/gitlab/-/merge_requests/24135, we
reverted the problematic
`ActivatePrometheusServicesForSharedClusterApplications` background
migration, but the migration only dropped jobs that were in the
`background_migration` Sidekiq queue. There may be more jobs in the
Sidekiq scheduled or retry sets, so we need to clear those too.

Closes https://gitlab.com/gitlab-com/gl-infra/infrastructure/issues/9160