refactor(edge-compute): enforce es6 good practices (#3961)

* refactor(edge-groups): use es6 imports

* refactor(edge-jobs): es6 imports

* refactor(edge-stacks): use es6 imports

* refactor(edge-compute): use es6 imports in components

* refactor(edge-compute): use named imports

app/edge/components/edge-stack-endpoints-datatable/edgeStackEndpointsDatatableController.js

@@ -1,6 +1,6 @@
 import angular from 'angular';
 
-class EdgeStackEndpointsDatatableController {
+export class EdgeStackEndpointsDatatableController {
   constructor($async, $scope, $controller, DatatableService, PaginationService, Notifications) {
     this.extendGenericController($controller, $scope);
     this.DatatableService = DatatableService;
@@ -106,6 +106,3 @@ class EdgeStackEndpointsDatatableController {
     }
   }
 }
-
-angular.module('portainer.edge').controller('EdgeStackEndpointsDatatableController', EdgeStackEndpointsDatatableController);
-export default EdgeStackEndpointsDatatableController;