Add cron for prometheus integration health check

See https://gitlab.com/gitlab-org/gitlab/-/issues/322581

app/workers/all_queues.yml

@@ -246,6 +246,15 @@
   :weight: 1
   :idempotent: true
   :tags: []
+- :name: cronjob:clusters_integrations_check_prometheus_health
+  :worker_name: Clusters::Integrations::CheckPrometheusHealthWorker
+  :feature_category: :incident_management
+  :has_external_dependencies: true
+  :urgency: :low
+  :resource_boundary: :unknown
+  :weight: 1
+  :idempotent: true
+  :tags: []
 - :name: cronjob:container_expiration_policy
   :worker_name: ContainerExpirationPolicyWorker
   :feature_category: :container_registry
@@ -1087,15 +1096,6 @@
   :idempotent:
   :tags:
   - :needs_own_queue
-- :name: incident_management:clusters_integrations_check_prometheus_health
-  :worker_name: Clusters::Integrations::CheckPrometheusHealthWorker
-  :feature_category: :incident_management
-  :has_external_dependencies: true
-  :urgency: :low
-  :resource_boundary: :unknown
-  :weight: 2
-  :idempotent: true
-  :tags: []
 - :name: incident_management:incident_management_add_severity_system_note
   :worker_name: IncidentManagement::AddSeveritySystemNoteWorker
   :feature_category: :incident_management

app/workers/clusters/integrations/check_prometheus_health_worker.rb

@@ -12,7 +12,6 @@ module Clusters
       include CronjobQueue
       # rubocop:enable Scalability/CronWorkerContext
 
-      queue_namespace :incident_management
       feature_category :incident_management
       urgency :low
 

config/initializers/1_settings.rb

@@ -591,6 +591,9 @@ Settings.cron_jobs['batched_background_migrations_worker']['job_class'] = 'Datab
 Settings.cron_jobs['issues_reschedule_stuck_issue_rebalances'] ||= Settingslogic.new({})
 Settings.cron_jobs['issues_reschedule_stuck_issue_rebalances']['cron'] ||= '* 0/15 * * *'
 Settings.cron_jobs['issues_reschedule_stuck_issue_rebalances']['job_class'] = 'Issues::RescheduleStuckIssueRebalancesWorker'
+Settings.cron_jobs['clusters_integrations_check_prometheus_health_worker'] ||= Settingslogic.new({})
+Settings.cron_jobs['clusters_integrations_check_prometheus_health_worker']['cron'] ||= '0 * * * *'
+Settings.cron_jobs['clusters_integrations_check_prometheus_health_worker']['job_class'] = 'Clusters::Integrations::CheckPrometheusHealthWorker'
 
 Gitlab.ee do
   Settings.cron_jobs['analytics_devops_adoption_create_all_snapshots_worker'] ||= Settingslogic.new({})