Issue #3067198 by Berdir, mikelutz, alexpott: Properly deprecate UrlGeneratorTrait

core/lib/Drupal/Core/Controller/ControllerBase.php

core/lib/Drupal/Core/Entity/Controller/EntityController.php

core/lib/Drupal/Core/Form/FormBase.php

core/lib/Drupal/Core/Routing/UrlGeneratorTrait.php

...odules/aggregator/src/Controller/AggregatorController.php

core/modules/aggregator/src/Form/OpmlFeedAdd.php

core/modules/comment/src/CommentForm.php

core/modules/comment/src/Controller/CommentController.php

...ranslation/src/Controller/ConfigTranslationController.php

core/modules/contact/src/Controller/ContactController.php

core/modules/forum/src/Form/Overview.php

core/modules/language/src/Form/LanguageAddForm.php

core/modules/language/src/Form/NegotiationUrlForm.php

core/modules/locale/src/Form/LocaleSettingsForm.php

core/modules/locale/src/Form/TranslationStatusForm.php

core/modules/menu_ui/src/MenuForm.php

core/modules/path/src/Controller/PathController.php

core/modules/search/src/Form/SearchBlockForm.php

core/modules/shortcut/src/Form/SetCustomize.php

core/modules/shortcut/src/Form/SwitchShortcutSet.php