drupal-rector: writing rules for new Drupal 9.3.x deprecations

I worked on Drupal Rector to provide fixes for some of the top deprecations for Drupal 9.3.x * drupal_get_path() and drupal_get_filename() https://www.drupal.org/node/2940438 * render() in https://www.drupal.org/node/2939099 * file_save_data() and friends in https://www.drupal.org/node/3223520