Merge branch '7.4' into 8.0

* 7.4:
  [HttpFoundation] Fix session cookie_lifetime not applied in mock session storage
  [Validator] Fix test
  [Serializer] Fix denormalization of magic `__set` properties
  [Config] Fix NodeDefinition template to be covariant
  Add 'sms' to hostless schemes
  [Validator] Fix required options check when extending a constraint with a simplified constructor
  [Validator] Skip ExpressionLanguage requirement in When constraint for closure expressions
  [Cache] Add timeout and slot eviction to LockRegistry stampede prevention
  [Console] Fix OUTPUT_RAW corrupting binary content on Windows
  [Form] Fix session data contamination by non-serializable objects in form flow
  [Mime] Use shell_exec() instead of passthru() in FileBinaryMimeTypeGuesser
  [HttpClient] Fix streaming from CachingHttpClient
  [DoctrineBridge] Rename `_schema_subscriber_check` table to `schema_subscriber_check_` for Oracle compatibility
  [HttpClient] Fix CachingHttpClient compatibility with decorator clients on 304 responses
  [FrameworkBundle] Fix stale container after reboot in KernelTestCase
  [Form] Fix duplicate validation errors when ValidatorExtension is instantiated multiple times

Author: nicolas-grekas

Definition/Builder/NodeDefinition.php

@@ -19,7 +19,7 @@
 /**
  * This class provides a fluent interface for defining a node.
  *
- * @template TParent of NodeParentInterface|null = null
+ * @template-covariant TParent of NodeParentInterface|null = null
  *
  * @author Johannes M. Schmitt <schmittjoh@gmail.com>
  */