Merge branch '6.4' into 7.0

* 6.4: (21 commits)
  [ErrorHandler] Add missing self-closing tags on link elements
  Fix merge (bis)
  Fix merge
  Add missing return type
  [FrameworkBundle] ConfigBuilderCacheWarmer should be non-optional
  [HttpClient] Fix pausing responses before they start when using curl
  [Notifier] Updated the NTFY notifier to run without a user parameter
  [Translation] Fix constant domain resolution in PhpAstExtractor
  separate child and parent context in NotificationEmail on writes
  [Mailer] [Mailgun] Fix sender header encoding
  do not overwrite the cache key when it is false
  [Mailer] [Scaleway] Fix attachment handling
  [Mailer] Throw TransportException when unable to read from socket
  [Serializer] Rewrite `AbstractObjectNormalizer::createChildContext()` to use the provided `cache_key` from original context when creating child contexts
  Revert #47715
  [HttpClient] Fix error chunk creation in passthru
  Adjusting and removing the 'review' attribute from the pt_br translation XML.
  [DependencyInjection] Fix loading all env vars from secrets when only a subset is needed
  Fix option filenameMaxLength to the File constraint (Image)
  [Serializer] Take unnamed variadic parameters into account when denormalizing
  ...

Author: nicolas-grekas

LazyString.php

@@ -39,7 +39,7 @@ public static function fromCallable(callable|array $callback, mixed ...$argument
                     $callback[1] ??= '__invoke';
                 }
                 $value = $callback(...$arguments);
-                $callback = self::getPrettyName($callback);
+                $callback = !\is_scalar($value) && !$value instanceof \Stringable ? self::getPrettyName($callback) : 'callable';
                 $arguments = null;
             }