wayland: DrmLeaseDevice: use Q_OBJECT macro
Trace from bug:
#0 doActivate<false> (sender=0x723878002840, signal_index=3, argv=0x7fffb699e490) at /usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.2/src/corelib/tools/qscopedpointer.h:110
#1 0x00007238c73e8c07 in KWin::DrmGpu::activeChanged (_t1=<optimized out>, this=0x723878002840) at /usr/src/debug/kwin/build/src/kwin_autogen/include/moc_drm_gpu.cpp:333
#2 KWin::DrmGpu::setActive (this=0x723878002840, active=true) at /usr/src/debug/kwin/kwin-6.0.2/src/backends/drm/drm_gpu.cpp:734
#3 0x00007238c4b90ca9 in QtPrivate::QSlotObjectBase::call (a=0x7fffb699e5d0, r=0x7238b8009810, this=0x60e9eb54f5a0, this=<optimized out>, r=<optimized out>, a=<optimized out>)
at /usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.2/src/corelib/kernel/qobjectdefs_impl.h:433
#4 doActivate<false> (sender=0x60e9eb54a960, signal_index=5, argv=0x7fffb699e5d0) at /usr/src/debug/qt6-base/qtbase-everywhere-src-6.6.2/src/corelib/kernel/qobject.cpp:4039
#5 0x00007238c717edd7 in KWin::Session::deviceResumed (this=<optimized out>, _t1=<optimized out>) at /usr/src/debug/kwin/build/src/kwin_autogen/include/moc_session.cpp:236
#6 0x00007238c718b9bb in KWin::LogindSession::handleResumeDevice (fileDescriptor=..., minor=<optimized out>, major=<optimized out>, this=0x60e9eb54a960)