Merge branch '6.4' into 7.0

* 6.4:
  Partially revert "DX: PHP CS Fixer - update excluded paths and apply some minor CS"
  [AssetMapper] Allowing for files to be written to some non-local location
  [HttpKernel] Resolve EBADP error on flock with LOCK_SH with NFS
  [AssetMapper] Fixing bug of bad parsing of imports when an import then export are adjacent
  add missing basque translations
  [FrameworkBundle][Validator] Allow implementing validation groups provider outside DTOs
  [Notifier][Novu] Implement overrides
  [Validator] Handle `null` case
  [Workflow] List place or transition listeners in profiler
  [Intl] Add support for emoji 15.1
  Replace Tickets by Issues
  [Validator] Add missing arabic translations
  [Validator] Added missing translations for Romanian language for Validator component
  [Messenger] Fix graceful exit with ids
  [HttpKernel] Add parameters `kernel.runtime_mode` and `kernel.runtime_mode.*`, all set from env var `APP_RUNTIME_MODE`

Author: nicolas-grekas

Debug.php

@@ -22,7 +22,7 @@ public static function enable(): ErrorHandler
     {
         error_reporting(-1);
 
-        if (!\in_array(\PHP_SAPI, ['cli', 'phpdbg'], true)) {
+        if (!\in_array(\PHP_SAPI, ['cli', 'phpdbg', 'embed'], true)) {
             ini_set('display_errors', 0);
         } elseif (!filter_var(\ini_get('log_errors'), \FILTER_VALIDATE_BOOL) || \ini_get('error_log')) {
             // CLI - display errors only if they're not already logged to STDERR

ErrorHandler.php

@@ -640,7 +640,7 @@ public static function handleFatalError(array $error = null): void
      */
     private function renderException(\Throwable $exception): void
     {
-        $renderer = \in_array(\PHP_SAPI, ['cli', 'phpdbg'], true) ? new CliErrorRenderer() : new HtmlErrorRenderer($this->debug);
+        $renderer = \in_array(\PHP_SAPI, ['cli', 'phpdbg', 'embed'], true) ? new CliErrorRenderer() : new HtmlErrorRenderer($this->debug);
 
         $exception = $renderer->render($exception);