Provide an alternative to xwiki:livedata:entriesUpdated

Currently, xwiki:livedata:entriesUpdated is the mechanism to provide to enhance the results provided by the source.

It is used as a sign that the DOM has been refreshed after a data update (e.g., pagination change, refresh, filters change...).

1. We can see with XWIKI-23415 that this mechanism is fragile as we don't control how Vue is refreshing the DOM after the reactive data are updated
2. this is also breaking the development model of Vue where direct manipulation of the DOM is avoided

Instead, we should provide a new event with the new data as a parameter and wait for the listener to update the data before assigning them to the component.
That way, we could avoid relying on the rendering mechanism of Vue.