feature #52193 [PhpUnitBridge] Allow setting the locale using SYMFONY_PHPUNIT_LOCALE env var (VincentLanglet)

This PR was squashed before being merged into the 6.4 branch.

Discussion
----------

[PhpUnitBridge] Allow setting the locale using SYMFONY_PHPUNIT_LOCALE env var

| Q             | A
| ------------- | ---
| Branch?       | 6.4
| Bug fix?      | yes
| New feature?  | yes
| Deprecations? | no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Tickets       | Fix #52185
| License       | MIT

cc `@nicolas`-grekas

Commits
-------

2954468de1 [PhpUnitBridge] Allow setting the locale using SYMFONY_PHPUNIT_LOCALE env var

Author: nicolas-grekas

Diff for: CHANGELOG.md

@@ -1,6 +1,11 @@
 CHANGELOG
 =========
 
+6.4
+---
+
+ * Allow setting the locale using `SYMFONY_PHPUNIT_LOCALE` env var
+
 6.3
 ---
 

Diff for: Legacy/SymfonyTestsListenerTrait.php

@@ -50,6 +50,8 @@ class SymfonyTestsListenerTrait
      */
     public function __construct(array $mockedNamespaces = [])
     {
+        setlocale(\LC_ALL, $_ENV['SYMFONY_PHPUNIT_LOCALE'] ?? 'C');
+
         if (class_exists(ExcludeList::class)) {
             (new ExcludeList())->getExcludedDirectories();
             ExcludeList::addDirectory(\dirname((new \ReflectionClass(__CLASS__))->getFileName(), 2));

Diff for: bootstrap.php

@@ -29,9 +29,6 @@
     unset($GLOBALS['__composer_autoload_files'][$fileIdentifier]);
 }
 
-// Enforce a consistent locale
-setlocale(\LC_ALL, 'C');
-
 if (class_exists(Deprecation::class)) {
     Deprecation::withoutDeduplication();