Merge branch '6.4' into 7.0

* 6.4:
  Revert "bug #57520 [SecurityBundle] Remove unused memory users’ `name` attribute from the XSD (MatTheCat)"
  [HttpKernel] Enable optional cache-warmers when cache-dir != build-dir
  [Filesystem] Fix Filesystem::remove() on Windows
  [DoctrineBridge] Fix compat with DI >= 6.4
  [String] Fix *String::snake methods

Author: nicolas-grekas

Kernel.php

@@ -521,10 +521,17 @@ protected function initializeContainer(): void
             touch($oldContainerDir.'.legacy');
         }
 
-        $preload = $this instanceof WarmableInterface ? (array) $this->warmUp($this->container->getParameter('kernel.cache_dir'), $buildDir) : [];
+        $cacheDir = $this->container->getParameter('kernel.cache_dir');
+        $preload = $this instanceof WarmableInterface ? (array) $this->warmUp($cacheDir, $buildDir) : [];
 
         if ($this->container->has('cache_warmer')) {
-            $preload = array_merge($preload, (array) $this->container->get('cache_warmer')->warmUp($this->container->getParameter('kernel.cache_dir'), $buildDir));
+            $cacheWarmer = $this->container->get('cache_warmer');
+
+            if ($cacheDir !== $buildDir) {
+                $cacheWarmer->enableOptionalWarmers();
+            }
+
+            $preload = array_merge($preload, (array) $cacheWarmer->warmUp($cacheDir, $buildDir));
         }
 
         if ($preload && file_exists($preloadFile = $buildDir.'/'.$class.'.preload.php')) {