Add customizable user roles (#18641)

* Add customizable user roles

* Various fixes and improvements

* Add migration for old settings and fix tootctl role management

app/services/report_service.rb

@@ -38,7 +38,7 @@ class ReportService < BaseService
   def notify_staff!
     return if @report.unresolved_siblings?
 
-    User.staff.includes(:account).each do |u|
+    User.those_who_can(:manage_reports).includes(:account).each do |u|
       LocalNotificationWorker.perform_async(u.account_id, @report.id, 'Report', 'admin.report')
       AdminMailer.new_report(u.account, @report).deliver_later if u.allows_report_emails?
     end