Add customizable user roles (#18641)

* Add customizable user roles

* Various fixes and improvements

* Add migration for old settings and fix tootctl role management

spec/controllers/admin/action_logs_controller_spec.rb

@@ -5,7 +5,7 @@ require 'rails_helper'
 describe Admin::ActionLogsController, type: :controller do
   describe 'GET #index' do
     it 'returns 200' do
-      sign_in Fabricate(:user, admin: true)
+      sign_in Fabricate(:user, role: UserRole.find_by(name: 'Admin'))
       get :index, params: { page: 1 }
 
       expect(response).to have_http_status(200)