Building on arch with wayland support now fails due to Qt6 files restructuring

[kd-11]

Compilation fails because we actually reference a private header for wayland support.

rpcs3/rpcs3qt/gs_frame.cpp:42:10: fatal error: 'qpa/qplatformnativeinterface.h' file not found

A simple workaround is to just import the full thing. Private files are now versioned, so the path becomes:

#include <6.10.0/QtGui/qpa/qplatformnativeinterface.h>

Or just never compile for wayland I guess lol. This is mostly here until I figure out what needs to be done to solve the issue without private header usage.

[qurious-pixel]

PR #17589 links the private headers.

[kd-11]

Closing as fixed by #17589