Don't use deprecated or removed SafeMarkup methods in D8 module

The civicrm-drupal module for Drupal 8 uses the deprecated SafeMarkup class in a couple of places, including some methods that were removed entirely.

One instance of using SafeMarkup::set() (which was removed) in \Drupal\civicrm\Form\UserProfile will cause a fatal error if you go to the "Name and Address" tab on a user profile.

All instances of SafeMarkup should be replaced with their recommended substitutes per https://www.drupal.org/node/2549395