(Re-)enable attribute class polyfill related tests

[jrfnl]

The Symfony PHP 8.2, 8.4 and 8.5 polyfills all contain attribute class polyfills.

At this moment, it is not possible to modularly enough ignore notices about these attribute classes. This is annoying for users, on the other hand, if we would ignore the current error codes, the user may need see PHPCompatibility notices about other attributes, which also carries a risk.

All in all, the attribute detection and handling in PHPCompatibility itself needs to be improved before we can start ignoring usage of these polyfilled attributes.

I've opened an issue upstream about this: PHPCompatibility/PHPCompatibility#1935
Once that issue has been addressed, the tests + rulesets in this package will need to be re-enabled/updated.