Merge branch '7.3' into 7.4

* 7.3:
  [JsonStreamer] lazyGhostsDir should be optional
  [TypeInfo] Fix type alias resolving
  [Validator] review cs tran
  Fix building packages in the CI
  implicitly run all Composer commands non-interactively
  re-add accidentally removed changelog examples
  [TypeInfo] Handle `key-of` and `value-of` types
  [PhpUnitBridge] Skip bootstrap for PHPUnit >=10
  [FrameworkBundle] ensureKernelShutdown in tearDownAfterClass
  don't register SchedulerTriggerNormalizer without symfony/serializer
  [TypeInfo] Fix merging collection value types with union types

Author: nicolas-grekas

JsonStreamReader.php

@@ -45,7 +45,7 @@ public function __construct(
         private ContainerInterface $valueTransformers,
         PropertyMetadataLoaderInterface $propertyMetadataLoader,
         string $streamReadersDir,
-        string $lazyGhostsDir,
+        ?string $lazyGhostsDir = null,
     ) {
         $this->streamReaderGenerator = new StreamReaderGenerator($propertyMetadataLoader, $streamReadersDir);
         $this->instantiator = new Instantiator();