minor #35369 [Filesystem] chown and chgrp should also accept int as owner and...

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
----------

[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
-------

6b811e6b chown and chgrp should also accept int as owner and group