Magento2\Sniffs\Legacy\RestrictedCodeSniff doesn't catch namespaced classes

Preconditions

1. Magento 2.4.5-p1
2. Magento Coding Standard v29

Steps to reproduce

1. Create a php file, where you include any namespaced class from restricted_classes.php for example \Magento\Framework\Serialize\Serializer\Serialize in the constructor or any other place
2. Run code sniffer on that file.

Expected result

1. Sniffer caught the class

Actual result

1. Sniffer didn't catch the class

Notes

Registered tokens contain only partial values for classes, they transmit parts of this class in turn, Magento, then Framework, then Serialize, and so on, but the whole class is not transmitted. Therefore, the sniffer only works for classes that consist of a single word or are combined with an underscore _.

Start with Magento2/Sniffs/Legacy/RestrictedCodeSniff.php and inspect the registered tokens referenced in the issue, then compare them with the fully qualified names in Magento2/Sniffs/Legacy/_files/restricted_classes.php. Run CodeSniffer against a PHP file using a namespaced restricted class such as Magento\Framework\Serialize\Serializer\Serialize; done means the sniffer reports that class.