minor #61371 chore: PHP CS Fixer - restore PHP / PHPUnit rulesets (keradus)

This PR was squashed before being merged into the 7.4 branch.

Discussion
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 chore: PHP CS Fixer - restore PHP / PHPUnit rulesets

| Q             | A
| ------------- | ---
| Branch?       | 7.4
| Bug fix?      | no
| New feature?  | no <!-- please update src/**/CHANGELOG.md files -->
| Deprecations? | no <!-- please update UPGRADE-*.md and src/**/CHANGELOG.md files -->
| Issues        | Fix CS <!-- prefix each issue number with "Fix #", no need to create an issue if none exists, explain below instead -->
| License       | MIT

relates to symfony/symfony@5d4e211#r163638626 , showing:
- possible improvements to codebase that those ruleset can still offer (especially when targetting newest possible target version)
- and also preventing old way to still be in use, if someone forget to use new syntax/methods

with love by [PHP Coding Standards Fixer](https://cs.symfony.com/)

Commits
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92940de5e52  chore: PHP CS Fixer - restore PHP / PHPUnit rulesets

Author: nicolas-grekas

Dumper/FileDumper.php

@@ -49,7 +49,7 @@ public function dump(MessageCatalogue $messages, array $options = []): void
             $fullpath = $options['path'].'/'.$this->getRelativePath($domain, $messages->getLocale());
             if (!file_exists($fullpath)) {
                 $directory = \dirname($fullpath);
-                if (!file_exists($directory) && !@mkdir($directory, 0777, true)) {
+                if (!file_exists($directory) && !@mkdir($directory, 0o777, true)) {
                     throw new RuntimeException(\sprintf('Unable to create directory "%s".', $directory));
                 }
             }

Writer/TranslationWriter.php

@@ -61,7 +61,7 @@ public function write(MessageCatalogue $catalogue, string $format, array $option
         // get the right dumper
         $dumper = $this->dumpers[$format];
 
-        if (isset($options['path']) && !is_dir($options['path']) && !@mkdir($options['path'], 0777, true) && !is_dir($options['path'])) {
+        if (isset($options['path']) && !is_dir($options['path']) && !@mkdir($options['path'], 0o777, true) && !is_dir($options['path'])) {
             throw new RuntimeException(\sprintf('Translation Writer was not able to create directory "%s".', $options['path']));
         }