Send event to Product Analytics snowplow collector

ee/app/services/epics/issue_promote_service.rb

@@ -34,6 +34,10 @@ module Epics
       ::Gitlab::Tracking.event(
         'epics', 'promote', property: 'issue_id', value: original_entity.id
       )
+
+      ::ProductAnalytics::Tracker.event(
+        'epics', 'promote', property: 'issue_id', value: original_entity.id
+      )
     end
 
     def create_new_entity

ee/spec/services/epics/issue_promote_service_spec.rb

@@ -60,6 +60,7 @@ RSpec.describe Epics::IssuePromoteService do
 
           before do
             allow(Gitlab::Tracking).to receive(:event).with('epics', 'promote', an_instance_of(Hash))
+            allow(ProductAnalytics::Tracker).to receive(:event).with('epics', 'promote', an_instance_of(Hash))
 
             subject.execute(issue)
           end
@@ -145,6 +146,7 @@ RSpec.describe Epics::IssuePromoteService do
         context 'when issue has notes' do
           before do
             allow(Gitlab::Tracking).to receive(:event).with('epics', 'promote', an_instance_of(Hash))
+            allow(ProductAnalytics::Tracker).to receive(:event).with('epics', 'promote', an_instance_of(Hash))
             issue.reload
           end