Compatibility Fixes for drupal 9, twig usage and minimal support for usage in the pargraphs-module (validation) * Issue #3231223 by Luca Lusso: Form validations doesn't work when the field is on a paragraph * Issue #3231451 by neffets: Drupal 9 compatibility, show TWIG template * Issue #3231451 by neffets: Drupal 9 compatibility (upgrade-status and rector)