minor #35369 [Filesystem] chown and chgrp should also accept int as owner and group (3.4) (Slamdunk)

This PR was merged into the 3.4 branch.

Discussion
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[Filesystem] chown and chgrp should also accept int as owner and group (3.4)

| Q             | A
| ------------- | ---
| Branch?       | 3.4
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Tickets       |
| License       | MIT
| Doc PR        |

Reference: https://github.com/symfony/symfony/pull/35356#issuecomment-575526299

Commits
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6b811e6b4c chown and chgrp should also accept int as owner and group

src/Symfony/Component/Filesystem/Filesystem.php

@@ -211,7 +211,7 @@ class Filesystem
      * Change the owner of an array of files or directories.
      *
      * @param string|iterable $files     A filename, an array of files, or a \Traversable instance to change owner
-     * @param string          $user      The new owner user name
+     * @param string|int      $user      A user name or number
      * @param bool            $recursive Whether change the owner recursively or not
      *
      * @throws IOException When the change fails
@@ -238,7 +238,7 @@ class Filesystem
      * Change the group of an array of files or directories.
      *
      * @param string|iterable $files     A filename, an array of files, or a \Traversable instance to change group
-     * @param string          $group     The group name
+     * @param string|int      $group     A group name or number
      * @param bool            $recursive Whether change the group recursively or not
      *
      * @throws IOException When the change fails