Merge branch '5.4' into 6.4

* 5.4:
  [Console][PhpUnitBridge][VarDumper] Fix `NO_COLOR` empty value handling
  [Translation] Fix CSV escape char in `CsvFileLoader` on PHP >= 7.4
  [DoctrineBridge] fix messenger bus dispatch inside an active transaction
  [HttpFoundation] Add tests for uncovered sections
  treat uninitialized properties referenced by property paths as null
  properly set up constraint options
  [ErrorHandler][VarDumper] Remove PHP 8.4 deprecations
  [Core] Fix & Enhance security arabic translation.

Author: nicolas-grekas

Output/StreamOutput.php

@@ -93,7 +93,7 @@ protected function doWrite(string $message, bool $newline)
     protected function hasColorSupport(): bool
     {
         // Follow https://no-color.org/
-        if (isset($_SERVER['NO_COLOR']) || false !== getenv('NO_COLOR')) {
+        if ('' !== ($_SERVER['NO_COLOR'] ?? getenv('NO_COLOR') ?: '')) {
             return false;
         }