Add metric defintion for promoted_issues

config/metrics/counts_28d/20210916080405_promoted_issues.yml

+---
+key_path: counts_monthly.promoted_issues
+name: count_promoted_issues
+description: Count of issues promoted to epics
+product_section: growth
+product_stage: growth
+product_group: group::product intelligence
+product_category: collection
+value_type: number
+status: active
+milestone: "14.3"
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/70485
+time_frame: 28d
+data_source: database
+data_category: optional
+performance_indicator_type: []
+distribution:
+- ce
+- ee
+tier:
+- free
+- premium
+- ultimate

ee/spec/config/metrics/every_metric_definition_spec.rb

@@ -29,6 +29,7 @@ RSpec.describe 'Every metric definition' do
       mock_ci
       mock_monitoring
       user_auth_by_provider
+      promoted_issues
     ).freeze
   end