libcppyy shows up in top-level site-packages

[hageboeck]

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Description

In the spirit of #14917, Gentoo with ROOT master warns about:

 * Verifying compiled files for python3.13                                                                                                                                                                                             
 *                                                                                                                                                                                                                                              
 * QA Notice: The following unexpected files/directories were found                                                                                                                                                                             
 * top-level in the site-packages directory:                                                                                                                                                                                                    
 *                                                                                                                                                                                                                                              
 *   /usr/lib/python3.13/site-packages/libcppyy.so.6.37.01                                                                                                                                                                                      
 *                                                                                                                                                                                                                                              
 * This is most likely a bug in the build system.  More information                                                                                                                                                                             
 * can be found in the Python Guide:                                                                                                                                                                                                           
 * https://projects.gentoo.org/python/guide/qawarn.html#stray-top-level-files-in-site-packages  

Reproducer

Install root-master in the system

ROOT version

Master

Installation method

Source

Operating system

Linux

Additional context

No response