[Console] Correct max width for ChoiceQuestion #15368
Description
https://github.com/symfony/Console/blob/2.7/Helper/QuestionHelper.php#L160
Here is a wrong calculation for cyrillic values.
- $width = max(array_map('strlen', array_keys($question->getChoices())));
+ $width = max(array_map('mb_strlen', array_keys($question->getChoices())));