Use Vue test utils instead of triggerEvent() from tracking_helper.js

The following discussion from !17550 (merged) should be addressed:

• @nmezzopera started a discussion: (+2 comments)

  I am not 100% sure but I think you can replace triggerEvent with [].trigger('click', {bubbles: true}) coming from vue-test-utils. If this works you can remove the custom implementation ( if is not used by another file )