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

CacheWarmer/ConfigBuilderCacheWarmer.php

@@ -80,6 +80,6 @@ private function dumpExtension(ExtensionInterface $extension, ConfigBuilderGener
 
     public function isOptional(): bool
     {
-        return true;
+        return false;
     }
 }

Secrets/SodiumVault.php

@@ -12,6 +12,7 @@
 namespace Symfony\Bundle\FrameworkBundle\Secrets;
 
 use Symfony\Component\DependencyInjection\EnvVarLoaderInterface;
+use Symfony\Component\String\LazyString;
 use Symfony\Component\VarExporter\VarExporter;
 
 /**
@@ -169,7 +170,14 @@ public function list(bool $reveal = false): array
 
     public function loadEnvVars(): array
     {
-        return $this->list(true);
+        $envs = [];
+        $reveal = $this->reveal(...);
+
+        foreach ($this->list() as $name => $value) {
+            $envs[$name] = LazyString::fromCallable($reveal, $name);
+        }
+
+        return $envs;
     }
 
     private function loadKeys(): void