Merge branch '4.4' into 5.0

* 4.4:
  [PhpUnitBridge] add PolyfillTestCaseTrait::expectExceptionMessageMatches to provide FC with recent phpunit versions
  [Messenger] Make sure redis transports are initialized correctly
  Remove return type for Twig function workflow_metadata()
  [DI] fix typo

Extension/WorkflowExtension.php

@@ -95,7 +95,7 @@ public function getMarkedPlaces(object $subject, bool $placesNameOnly = true, st
      *                                                Use a string (the place name) to get place metadata
      *                                                Use a Transition instance to get transition metadata
      */
-    public function getMetadata(object $subject, string $key, $metadataSubject = null, string $name = null): ?string
+    public function getMetadata(object $subject, string $key, $metadataSubject = null, string $name = null)
     {
         return $this
             ->workflowRegistry