Issue #1904854 by tim.plunkett: Convert Views UI to routes.

core/modules/field_ui/field_ui.module

...ules/views/lib/Drupal/views/Tests/UI/DefaultViewsTest.php

core/modules/views/lib/Drupal/views/Tests/UI/StorageTest.php

core/modules/views/lib/Drupal/views/Tests/UI/TagTest.php

core/modules/views/views_ui/admin.inc

...iews_ui/lib/Drupal/views_ui/Routing/ViewsUIController.php

...s/views_ui/lib/Drupal/views_ui/ViewEditFormController.php

...s/views_ui/lib/Drupal/views_ui/ViewFormControllerBase.php

...iews_ui/lib/Drupal/views_ui/ViewPreviewFormController.php

core/modules/views/views_ui/lib/Drupal/views_ui/ViewUI.php

...ules/views/views_ui/lib/Drupal/views_ui/ViewsUiBundle.php

core/modules/views/views_ui/views_ui.module

core/modules/views/views_ui/views_ui.routing.yml