Merge branch '5.4' into 6.3

* 5.4:
  [Translation] Fix `TranslationNodeVisitor` with constant domain
  [Messenger] [AMQP] Throw exception on `nack` callback
  [Validator] revise Latvian translations
  [ErrorHandler] Fix `RecursiveDirectoryIterator` exception with wrong composer autoload
  [HttpFoundation] Request without content-type or content-length header should result in null values, not empty strings
  [Cache] Fix possible infinite loop in `CachePoolPass`
  [Mime] Fix undefined array key 0 when empty sender
  [Console] Allow '0' as a $shortcut in InputOption.php
  fix multi-byte code area to convert
  [Validator] Make it explicit when English translation differs from its resource name

Author: nicolas-grekas

Tests/Caster/FiberCasterTest.php

@@ -20,7 +20,7 @@ class FiberCasterTest extends TestCase
 
     public function testCastFiberNotStarted()
     {
-        $fiber = new \Fiber(static fn() => true);
+        $fiber = new \Fiber(static fn () => true);
 
         $expected = <<<EODUMP
 Fiber {