Implement Instance Moderation Notes (#31529)

spec/system/admin/account_moderation_notes_spec.rb

@@ -35,7 +35,7 @@ RSpec.describe 'Admin::AccountModerationNotes' do
     end
 
     def delete_note
-      within('.report-notes__item__actions') do
+      within('.report-notes__item:first-child .report-notes__item__actions') do
         click_on I18n.t('admin.reports.notes.delete')
       end
     end