Merge branch '5.3' into 5.4

* 5.3:
  Revert "minor #44642 [Workflow] Fix Event constructor requirements (lyrixx)"
  Skip transient tests on macos
  [Workflow] Fix Event constructor requirements
  [Translation] Handle the blank-translation in Loco Adapter
  [Serializer] Fix symfony/uid requirement

Author: nicolas-grekas

HttpClient/Test/HttpClientTestCase.php

@@ -835,19 +835,22 @@ public function testTimeoutWithActiveConcurrentStream()
         }
     }
 
+    /**
+     * @group transient-on-macos
+     */
     public function testTimeoutOnInitialize()
     {
         $p1 = TestHttpServer::start(8067);
-        $p2 = TestHttpServer::start(8078);
+        $p2 = TestHttpServer::start(8077);
 
         $client = $this->getHttpClient(__FUNCTION__);
         $start = microtime(true);
         $responses = [];
 
         $responses[] = $client->request('GET', 'http://localhost:8067/timeout-header', ['timeout' => 0.25]);
-        $responses[] = $client->request('GET', 'http://localhost:8078/timeout-header', ['timeout' => 0.25]);
+        $responses[] = $client->request('GET', 'http://localhost:8077/timeout-header', ['timeout' => 0.25]);
         $responses[] = $client->request('GET', 'http://localhost:8067/timeout-header', ['timeout' => 0.25]);
-        $responses[] = $client->request('GET', 'http://localhost:8078/timeout-header', ['timeout' => 0.25]);
+        $responses[] = $client->request('GET', 'http://localhost:8077/timeout-header', ['timeout' => 0.25]);
 
         try {
             foreach ($responses as $response) {
@@ -868,19 +871,22 @@ public function testTimeoutOnInitialize()
         }
     }
 
+    /**
+     * @group transient-on-macos
+     */
     public function testTimeoutOnDestruct()
     {
         $p1 = TestHttpServer::start(8067);
-        $p2 = TestHttpServer::start(8078);
+        $p2 = TestHttpServer::start(8077);
 
         $client = $this->getHttpClient(__FUNCTION__);
         $start = microtime(true);
         $responses = [];
 
         $responses[] = $client->request('GET', 'http://localhost:8067/timeout-header', ['timeout' => 0.25]);
-        $responses[] = $client->request('GET', 'http://localhost:8078/timeout-header', ['timeout' => 0.25]);
+        $responses[] = $client->request('GET', 'http://localhost:8077/timeout-header', ['timeout' => 0.25]);
         $responses[] = $client->request('GET', 'http://localhost:8067/timeout-header', ['timeout' => 0.25]);
-        $responses[] = $client->request('GET', 'http://localhost:8078/timeout-header', ['timeout' => 0.25]);
+        $responses[] = $client->request('GET', 'http://localhost:8077/timeout-header', ['timeout' => 0.25]);
 
         try {
             while ($response = array_shift($responses)) {