Merge branch '6.3' into 6.4

* 6.3:
  Make FormPerformanceTestCase compatible with PHPUnit 10
  [Security] Fix resetting traceable listeners
  [HttpClient] Fix type error with http_version 1.1
  [FrameworkBundle] Fix call to invalid method in NotificationAssertionsTrait
  [Validator] Add missing italian translations
  Fix order array sum normalizedData and nestedData
  Fix duplicate component in UPGRADE-6.3.md
  [Notifier] Tweak an error message
  Change incorrect message, when the sender in the global envelope or the from header of asEmailMessage() is not defined.
  [Messenger] Check if PCNTL is installed
  Bump Symfony version to 6.3.6
  Update VERSION for 6.3.5
  Update CHANGELOG for 6.3.5
  Bump Symfony version to 5.4.30
  Update VERSION for 5.4.29
  Update CONTRIBUTORS for 5.4.29
  Update CHANGELOG for 5.4.29
  [Mailer] [Mailgun] Fix outlook sender

Author: derrabus

Test/NotificationAssertionsTrait.php

@@ -29,7 +29,7 @@ public static function assertNotificationCount(int $count, string $transportName
 
     public static function assertQueuedNotificationCount(int $count, string $transportName = null, string $message = ''): void
     {
-        self::assertThat(self::getMessageMailerEvents(), new NotifierConstraint\NotificationCount($count, $transportName, true), $message);
+        self::assertThat(self::getNotificationEvents(), new NotifierConstraint\NotificationCount($count, $transportName, true), $message);
     }
 
     public static function assertNotificationIsQueued(MessageEvent $event, string $message = ''): void