Merge branch '6.4' into 7.0

* 6.4:
  [Serializer] Fix fixture
  [FrameworkBundle] Fix PHP 8.4 deprecation
  Add an experimental CI job for PHP 8.4
  [HttpClient] Fix PHP 8.3 deprecation in tests
  [Messenger] [Amqp] Handle AMQPConnectionException when publishing a message.

Console/Descriptor/TextDescriptor.php

@@ -597,7 +597,7 @@ private function formatControllerLink(mixed $controller, string $anchorText, ?ca
             } elseif (!\is_string($controller)) {
                 return $anchorText;
             } elseif (str_contains($controller, '::')) {
-                $r = new \ReflectionMethod($controller);
+                $r = new \ReflectionMethod(...explode('::', $controller, 2));
             } else {
                 $r = new \ReflectionFunction($controller);
             }