Merge branch '7.4' into 8.0

* 7.4:
  [Mime] Deprecate implementing `__sleep/wakeup()` on `AbstractPart` implementations
  [Validator] Deprecate implementing `__sleep/wakeup()` on GenericMetadata implementations
  [String] Deprecate implementing `__sleep/wakeup()` on string implementations
  More cleanups related to internal sleep/wakeup usages
  [HttpKernel] Deprecate `__sleep/wakeup()` on kernels and data collectors and make `Profile` final
  [Serializer] Make `AttributeMetadata` and `ClassMetadata` final
  Replace __sleep/wakeup() by __(un)serialize() when BC isn't a concern
  chore: PHP CS Fixer - simplify config

Author: nicolas-grekas

Extension/DataCollector/FormDataCollector.php

@@ -200,17 +200,15 @@ public function getData(): array|Data
     /**
      * @internal
      */
-    public function __sleep(): array
+    public function __serialize(): array
     {
         foreach ($this->data['forms_by_hash'] as &$form) {
             if (isset($form['type_class']) && !$form['type_class'] instanceof ClassStub) {
                 $form['type_class'] = new ClassStub($form['type_class']);
             }
         }
 
-        $this->data = $this->cloneVar($this->data);
-
-        return parent::__sleep();
+        return ['data' => $this->data = $this->cloneVar($this->data)];
     }
 
     protected function getCasters(): array

Util/OrderedHashMapIterator.php

@@ -51,12 +51,12 @@ public function __construct(
         $this->managedCursors[$this->cursorId] = &$this->cursor;
     }
 
-    public function __sleep(): array
+    public function __serialize(): array
     {
         throw new \BadMethodCallException('Cannot serialize '.__CLASS__);
     }
 
-    public function __wakeup(): void
+    public function __unserialize(array $data): void
     {
         throw new \BadMethodCallException('Cannot unserialize '.__CLASS__);
     }