Add Drupal::transliteration() and replace calls to transliteration service with it

havent grepped but i think there is no usage yet, since we have #1842718: Use new Transliteration functionality in core for machine names

$ grep -r "('transliteration')" core/
core/modules/system/lib/Drupal/system/Tests/Transliteration/TransliterationTest.php:    $transliterator_service = $this->container->get('transliteration');
core/modules/system/language.api.php: * $trans = drupal_container()->get('transliteration');

actually only one usage..and in a comment:) piece of cake!

/me facepalms

thats better

erm

So like this?

Let's try that again.

Committed/pushed to 8.x, thanks!