Migrate jQuery event usages to event-bus

[nickvergessen]

• Ref Trigger a proper event-bus event #728

• apps/federatedfilesharing/js/external.js (1 usage found) - refactor(federatedfilesharing): Replace deprecated function usage server#48725
  86 $('body').on('OCA.Notification.Action', function(e) {
• apps/files/js/filelist.js (1 usage found) - chore: Remove legacy UI scripts and styles from files server#48241
  380 $('body').on('OCA.Notification.Action', function(eventObject) {