Merge branch '5.4' into 6.2

* 5.4:
  [Validator] Add missing validator translations in Polish language
  [HttpClient] Fix encoding some characters in query strings
  [FrameworkBundle] Ignore missing directories in about command
  Revert "[Messenger] Respect `isRetryable` decision of the retry strategy when deciding if failed message should be re-delivered"

Author: nicolas-grekas

Command/AboutCommand.php

@@ -101,6 +101,10 @@ private static function formatFileSize(string $path): string
         if (is_file($path)) {
             $size = filesize($path) ?: 0;
         } else {
+            if (!is_dir($path)) {
+                return 'n/a';
+            }
+
             $size = 0;
             foreach (new \RecursiveIteratorIterator(new \RecursiveDirectoryIterator($path, \RecursiveDirectoryIterator::SKIP_DOTS | \RecursiveDirectoryIterator::FOLLOW_SYMLINKS)) as $file) {
                 if ($file->isReadable()) {