Fix symfony polyfills in scoper (#2998)

packages/easy-coding-standard/scoper.inc.php

@@ -2,12 +2,28 @@
 
 declare(strict_types=1);
 
+use Isolated\Symfony\Component\Finder\Finder;
+
+$symfonyPolyfillPhpFilesFinder = Finder::create();
+$symfonyPolyfillPhpFilesFinder = $symfonyPolyfillPhpFilesFinder->files();
+$symfonyPolyfillPhpFilesFinder = $symfonyPolyfillPhpFilesFinder->in(__DIR__ . '/vendor/symfony/polyfill-*');
+$symfonyPolyfillPhpFilesFinder = $symfonyPolyfillPhpFilesFinder->name('*.php');
+
+$symfonyPolyfillPhpFilesArray = \iterator_to_array($symfonyPolyfillPhpFilesFinder);
+$symfonyPolyfillPhpFilenames = \array_values($symfonyPolyfillPhpFilesArray);
+$symfonyPolyfillAllowlist = \array_map(
+    static function ($file) {
+        return $file->getPathName();
+    },
+    $symfonyPolyfillPhpFilenames
+);
+
 return [
     'files-whitelist' => [
-        // do not prefix "trigger_deprecatoin" from symfony - https://github.com/symfony/symfony/commit/0032b2a2893d3be592d4312b7b098fb9d71aca03
+        // do not prefix "trigger_deprecation" from symfony - https://github.com/symfony/symfony/commit/0032b2a2893d3be592d4312b7b098fb9d71aca03
         // these paths are relative to this file location, so it should be in the root directory
         'vendor/symfony/deprecation-contracts/function.php',
-    ],
+    ] + $symfonyPolyfillAllowlist,
     'whitelist' => [
         // needed for autoload, that is not prefixed, since it's in bin/* file
         'Symplify\*',
@@ -16,5 +32,6 @@
         'SlevomatCodingStandard\*',
         'Symfony\Component\DependencyInjection\Loader\Configurator\ContainerConfigurator',
         'Symfony\Component\DependencyInjection\Extension\ExtensionInterface',
+        'Symfony\Polyfill\*',
     ],
 ];

phpstan.neon

@@ -474,4 +474,10 @@ parameters:
                 - packages/set-config-resolver/src/ConfigResolver.php
                 - packages/set-config-resolver/src/SetAwareConfigResolver.php
 
-        - '#Content of method "create\(\)" is duplicated with method "create\(\)" in "Symplify\\ConsoleColorDiff\\Diff\\Output\\CompleteUnifiedDiffOutputBuilderFactory" class\. Use unique content or service instead#'
+        # needed as `humbug/php-scoper` provides `Isolated\Symfony\Component\Finder\Finder`
+        -
+            message: '#Call to static method create\(\) on an unknown class Isolated\\Symfony\\Component\\Finder\\Finder#'
+            paths:
+                - packages/easy-coding-standard/scoper.inc.php
+
+- '#Content of method "create\(\)" is duplicated with method "create\(\)" in "Symplify\\ConsoleColorDiff\\Diff\\Output\\CompleteUnifiedDiffOutputBuilderFactory" class\. Use unique content or service instead#'