Merge branch '5.4' into 6.2

* 5.4:
  [Serializer] Preserve array keys while denormalize variadic parameters
  [FrameworkBundle] enable metadata cache when annotation is disabled
  TranslatorBag::diff now iterates over catalogue domains instead of operation domains
  [HttpClient] Fix not calling the on progress callback when canceling a MockResponse
  [TwigBridge] Fix raw content rendering in HTML notification emails

Resources/views/Email/zurb_2/notification/body.html.twig

@@ -26,7 +26,7 @@
                     {% if markdown %}
                         {{ include('@email/zurb_2/notification/content_markdown.html.twig') }}
                     {% else %}
-                        {{ (raw ? content|raw : content)|nl2br }}
+                        {{ raw ? content|raw : content|nl2br }}
                     {% endif %}
                 {% endblock %}