Always show subscription form for report events in the admin interface

Admin user should be able to configure all event subscription types,
even if they are not participating in the corresponding beta program
or do not have the moderator role themself.

src/api/app/models/event_subscription/form.rb

@@ -45,8 +45,11 @@ def find_or_initialize_subscription(eventtype, receiver_role, channel)
 
     def show_form_for_create_report_event?(event_class:, subscriber:)
       if event_class.name.in?(['Event::ReportForProject', 'Event::ReportForPackage', 'Event::ReportForComment', 'Event::ReportForUser'])
-        # There is no subscriber for the global subscription configuration
-        return false if subscriber.blank?
+        # There is no subscriber associated to "global" event subscriptions
+        # which are set through the admin configuration interface.
+        # Admin user should be able to configure all event subscription types,
+        # even if they are not participating in the corresponding beta program
+        return true if subscriber.blank?
         return false unless ReportPolicy.new(subscriber, Report).notify?
       end