Issue #2867796 by murilohp, kkalashnikov, sophiavs, ameymudras, Ratan Priya,...

 *   - file: The file that any preprocess implementations reside in. This file

 *     will be included prior to the template being rendered, to make sure that

 *     the preprocess function (as needed) is actually loaded.

 *   - path: Override the path of the file to be used. Ordinarily the module or

 *     theme path will be used, but if the file will not be in the default

 *     path, include it here. This path should be relative to the Drupal root

 *     directory.

 *   - path: If specified, overrides the path to the directory that contains the

 *     file to be used. This path should be relative to the Drupal root

 *     directory. If not provided, the path will be set to the module or theme's

 *     templates directory.

 *   - template: The template name, without 'html.twig' on the end. The

 *     extension will be added automatically by the default rendering engine

 *     (which is Twig.) If 'path' is specified, 'template' should also be