WebformElementBase::hiddenElementAfterBuild() does not handle AccessResult objects

Problem/Motivation

WebformElementBase::hiddenElementAfterBuild() assumes #access is always a boolean but it can also be an AccessResult object.

Steps to reproduce

Alter a field like this:

/**
 * Implements hook_form_alter().
 */
function test_form_alter(array &$form): void {
  $form['elements']['name']['#access'] = AccessResult::forbidden();
}

The field is not displayed but hiddenElementAfterBuild() thinks it is.

Proposed resolution

hiddenElementAfterBuild() should check both cases (boolean and AccessResult objects).

Remaining tasks

User interface changes

API changes

Data model changes