Bugfix/polling improvements - Pointing polling to new backend endpoint designed for status only (#2949)

* Optimizing polling

* Fixed formatting issue

* Pointed new endpoint to new backend polling endpoint

* Missed a unit test update

* Fixed flake issue

app/assets/javascripts/job-status-polling.js

@@ -126,7 +126,6 @@ document.addEventListener('DOMContentLoaded', function () {
         await updateNotifications();
         stopPolling();
       }
-
     } catch (error) {
       if (retryCount < 3) {
         console.debug(`Job polling retry ${retryCount}`, error.message);