CombBox is loading data twice

Whenever user types a value into combobox input/filter, the underlying dataProvider is queried twice.
It may be tolerable for in-memory data providers, but it is extremely problematic with backend data providers.

The ComboBox behaved correctly until 8.6.0, the duplicate data provider query is unwanted consequence of fixes to issues
#11320 and #11341.

During DataCommunicator#reset() method, the beforeClientResponse() is eagerly invoked (and loading count+data from the provider). And when the combobox client receives them it asks for them once again.

See the following simple example and watch the stderr.

HorizontalLayout horizontal = new HorizontalLayout();
ComboBox<String> comboBox = new ComboBox<>();
comboBox.setDataProvider(new ListDataProvider<String>(Arrays.asList("blue", "red", "green", "purple", "grey", "orange")) {

  @Override
  public int size(Query<String, SerializablePredicate<String>> query) {
    System.err.println("COUNT " + query.getFilter().orElse(null));
    return super.size(query);
  }

  @Override
  public Stream<String> fetch(Query<String, SerializablePredicate<String>> query) {
    System.err.println("FETCH " + query.getLimit() + " " + query.getOffset() + " " + query.getFilter().orElse(null));
    return super.fetch(query);
  }
});
horizontal.addComponent(comboBox);
addComponent(horizontal);

Start with DataCommunicator#reset() and its eager beforeClientResponse() call, then reproduce the issue with the ComboBox and custom ListDataProvider example. Trace the count and fetch requests after typing in the filter; done means each input causes only the intended data-provider query rather than a duplicate.