[TASK] Adjust to "HTTP components for handling requests"
This change replaces the ``AjaxWidgetRoutingAspect`` by a custom
HTTP component that intercepts AJAX widget requests.
Fluids custom AJAX widget handling using AOP does not work together
with the HTTP components change in Flow (#52064).
Instead of adjusting the AOP aspect this change makes use of the new
feature by adding the ``AjaxWidgetComponent``.