Send email if feature flag or license is disabled

- Send email if incident_management feature flag or license is disabled.
- A new issue will be created for checking the prometheus_alerts license
in the execute method of the NotifyService.

ee/app/services/projects/prometheus/alerts/notify_service.rb

@@ -25,8 +25,8 @@ module Projects
         end
 
         def send_email?
-          return firings.any? unless incident_management_feature_enabled?
-          return false unless has_incident_management_license?
+          return firings.any? unless incident_management_feature_enabled? &&
+              has_incident_management_license?
 
           setting = project.incident_management_setting || project.build_incident_management_setting
 

ee/spec/services/projects/prometheus/alerts/notify_service_spec.rb

@@ -212,14 +212,7 @@ describe Projects::Prometheus::Alerts::NotifyService do
         stub_licensed_features(incident_management: false)
       end
 
-      it_behaves_like 'persists events'
-
-      it 'does not send notification' do
-        expect(project.feature_available?(:incident_management)).to eq(false)
-        expect(NotificationService).not_to receive(:new)
-
-        expect(subject).to eq(true)
-      end
+      it_behaves_like 'notifies alerts'
     end
 
     context 'with incident_management license' do