Merge branch '5.4' into 6.0

* 5.4: (29 commits)
  [DI] fix fixture
  [ErrorHandler] fix handling buffered SilencedErrorContext
  [HttpClient] fix Psr18Client when allow_url_fopen=0
  [DependencyInjection] Add support of PHP enumerations
  [Cache] handle prefixed redis connections when clearing pools
  [Cache] fix eventual consistency when using RedisTagAwareAdapter with a cluster
  [Uid] Prevent double validation in Uuid::fromString() with base32 values
  [Uid] Fix fromString() with low base58 values
  [Notifier] Add options to Microsoft Teams notifier
  [Notifier] Add Telnyx notifier bridge
  [Validator][Translation] Add ExpressionLanguageSyntax en and fr
  [HttpKernel] [HttpCache] Keep s-maxage=0 from ESI sub-responses
  Avoid broken action URL in text notification mail
  [FrameworkBundle] Add commented base64 version of secrets' keys
  [WebProfilerBundle] Improved the light/dark theme switching
  Fix references to CheckRememberMeConditionsListener
  [DependencyInjection] accept service locator definitions with no class
  [Cache] Disable locking on Windows by default
  [HttpClient] Add default base_uri to MockHttpClient
  [DependencyInjection] Fix binding "iterable $foo" when using the PHP-DSL
  ...

Author: nicolas-grekas

Internal/ComposerPlugin.php

@@ -93,7 +93,7 @@ public function updateAutoloadFile(): void
         if (!$nestingLevel) {
             $projectDir = '__'.'DIR__.'.var_export('/'.$projectDir, true);
         } else {
-            $projectDir = 'dirname(__'."DIR__, $nestingLevel)".('' !== $projectDir ? var_export('/'.$projectDir, true) : '');
+            $projectDir = 'dirname(__'."DIR__, $nestingLevel)".('' !== $projectDir ? '.'.var_export('/'.$projectDir, true) : '');
         }
 
         $runtimeClass = $extra['class'] ?? SymfonyRuntime::class;