[Form]: Add option `choice_html` to allow HTML content in ChoiceType labels

**Description**
Similar to [`label_html`](https://symfony.com/doc/current/reference/forms/types/form.html#label-html), add an option to allow HTML content in radio button labels. Suggested name: `choice_html`

**Example**
```php
$builder->add('foo', ChoiceType::class, ['choices' => $foos, 'expanded' => true, 'multiple' => false, 'choice_html' => true]);
