Include database load balancing for Deployments HooksWorker

Changelog: performance

app/workers/deployments/hooks_worker.rb

@@ -4,7 +4,7 @@ module Deployments
   class HooksWorker # rubocop:disable Scalability/IdempotentWorker
     include ApplicationWorker
 
-    data_consistency :always
+    data_consistency :delayed, feature_flag: :load_balancing_for_deployments_hooks_worker
 
     queue_namespace :deployment
     feature_category :continuous_delivery

config/feature_flags/development/load_balancing_for_deployments_hooks_worker.yml

+---
+name: load_balancing_for_deployments_hooks_worker
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/67878
+rollout_issue_url: https://gitlab.com/gitlab-org/gitlab/-/issues/338342
+milestone: '14.2'
+type: development
+group: group::release
+default_enabled: false

spec/workers/deployments/hooks_worker_spec.rb

@@ -49,5 +49,10 @@ RSpec.describe Deployments::HooksWorker do
 
       worker.perform(deployment_id: deployment.id, status_changed_at: status_changed_at)
     end
+
+    it_behaves_like 'worker with data consistency',
+                    described_class,
+                    feature_flag: :load_balancing_for_deployments_hooks_worker,
+                    data_consistency: :delayed
   end
 end