Merge branch '6.2' into 6.3

* 6.2:
  Update ComposerPlugin.php
  [Notifier] [OvhCloud] handle invalid receiver
  [Security] Return default value instead of deferring to lower prio resolvers when using #[CurrentUser] and no user is found
  [Cache] fix collecting cache stats when nesting computations
  [VarDumper] Fix JS to expand / collapse
  [Validator] Fix Email validator logic
  Fix user_identifier support after username has been deprecated in favor of it.
  [Tests] Remove `$this` occurrences in future static data providers
  [PropertyInfo] Fixes constructor extractor for mixed type
  use method_exists() instead of catching reflection exceptions

Internal/ComposerPlugin.php

@@ -58,7 +58,7 @@ public function uninstall(Composer $composer, IOInterface $io): void
 
     public function updateAutoloadFile(): void
     {
-        $vendorDir = $this->composer->getConfig()->get('vendor-dir');
+        $vendorDir = realpath($this->composer->getConfig()->get('vendor-dir'));
 
         if (!is_file($autoloadFile = $vendorDir.'/autoload.php')
             || false === $extra = $this->composer->getPackage()->getExtra()['runtime'] ?? []