Clean the handling of proxy initialization in the UnitOfWork

Using the VarExporter Hydrator to assign default values of properties when marking an entity as initialized is needed only when using var-exporter proxies.
For lazy objects, this behavior is already provided by `ReflectionClass::markLazyObjectAsInitialized`

Author: stof

src/UnitOfWork.php

@@ -2383,9 +2383,9 @@ public function createEntity(string $className, array $data, array &$hints = [])
                     $class->reflClass->markLazyObjectAsInitialized($entity);
                 } else {
                     $entity->__setInitialized(true);
-                }
 
-                Hydrator::hydrate($entity, (array) $class->reflClass->newInstanceWithoutConstructor());
+                    Hydrator::hydrate($entity, (array) $class->reflClass->newInstanceWithoutConstructor());
+                }
             } else {
                 if (
                     ! isset($hints[Query::HINT_REFRESH])