Description of problem:

Latest Mesa upgrade causes SDDM Greeter to crash.

sddm/0.21.0-4.fc40
mesa-filesystem-24.1.6-1.fc40.x86_64

```
(gdb) bt
#0  0x00007fa9bd4a8664 in __pthread_kill_implementation () at /lib64/libc.so.6
#1  0x00007fa9bd44fc4e in raise () at /lib64/libc.so.6
#2  0x00007fa9bd437902 in abort () at /lib64/libc.so.6
#3  0x00007fa9bbacb631 in qAbort() () at /lib64/libQt6Core.so.6
#4  0x00007fa9bbb19e27 in qt_message(QtMsgType, QMessageLogContext const&, char const*, __va_list_tag*) () at /lib64/libQt6Core.so.6
#5  0x00007fa9bbacc4d3 in QMessageLogger::fatal(char const*, ...) const () at /lib64/libQt6Core.so.6
#6  0x00007fa9bd79e774 in QSGRenderLoop::handleContextCreationFailure(QQuickWindow*) [clone .cold] () at /lib64/libQt6Quick.so.6
#7  0x00007fa9bd95d2c5 in QSGGuiThreadRenderLoop::ensureRhi(QQuickWindow*, QSGGuiThreadRenderLoop::WindowData&) () at /lib64/libQt6Quick.so.6
#8  0x00007fa9bd95d8e9 in QSGGuiThreadRenderLoop::renderWindow(QQuickWindow*) () at /lib64/libQt6Quick.so.6
#9  0x00007fa9bc447908 in QWindow::event(QEvent*) () at /lib64/libQt6Gui.so.6
#10 0x00007fa9bbb96dc8 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /lib64/libQt6Core.so.6
#11 0x00007fa9bc3e8215 in QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*) () at /lib64/libQt6Gui.so.6
#12 0x00007fa9bc44b4bc in QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt6Gui.so.6
#13 0x00007fa9bc9633f4 in userEventSourceDispatch(_GSource*, int (*)(void*), void*) () at /lib64/libQt6Gui.so.6
#14 0x00007fa9badc9e8c in g_main_context_dispatch_unlocked.lto_priv () at /lib64/libglib-2.0.so.0
#15 0x00007fa9bae2bc98 in g_main_context_iterate_unlocked.isra () at /lib64/libglib-2.0.so.0
#16 0x00007fa9badcb383 in g_main_context_iteration () at /lib64/libglib-2.0.so.0
#17 0x00007fa9bbe850a3 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt6Core.so.6
#18 0x00007fa9bbba3b03 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /lib64/libQt6Core.so.6
#19 0x00007fa9bbb9f9bc in QCoreApplication::exec() () at /lib64/libQt6Core.so.6
#20 0x00005638b082a7f6 in main ()
```

journalctl -xab-2 | grep sddm-greeter:

```
Aug 23 11:54:11 hostname sddm-helper[4811]: pam_unix(sddm-greeter:session): session opened for user sddm(uid=976) by (uid=0)
Aug 23 11:54:14 hostname sddm-greeter-qt6[4854]: EGL not available
Aug 23 11:54:14 hostname sddm-greeter-qt6[4854]: Loading file:///usr/share/sddm/themes/01-breeze-fedora/Main.qml...
Aug 23 11:54:14 hostname sddm-greeter-qt6[4854]: QRhiGles2: Failed to create temporary context
Aug 23 11:54:14 hostname sddm-greeter-qt6[4854]: QRhiGles2: Failed to create context
Aug 23 11:54:14 hostname sddm-greeter-qt6[4854]: Failed to create RHI (backend 2)
Aug 23 11:54:14 hostname audit[4854]: ANOM_ABEND auid=4294967295 uid=976 gid=976 ses=4294967295 subj=kernel pid=4854 comm="sddm-greeter-qt" exe="/usr/bin/sddm-greeter-qt6" sig=6 res=1
Aug 23 11:54:14 hostname sddm-greeter-qt6[4854]: Failed to initialize graphics backend for OpenGL.
Aug 23 11:54:15 hostname systemd-coredump[4941]: Process 4854 (sddm-greeter-qt) of user 976 dumped core.
                                                        Module sddm-greeter-qt6 from rpm sddm-0.21.0-4.fc40.x86_64
                                                        #20 0x00005638b082a7f6 main (sddm-greeter-qt6 + 0x157f6)
                                                        #23 0x00005638b082fb65 _start (sddm-greeter-qt6 + 0x1ab65)
░░ Subject: Process 4854 (sddm-greeter-qt) dumped core
░░ Process 4854 (sddm-greeter-qt) crashed and dumped core.
Aug 23 11:54:15 hostname sddm-helper[4811]: pam_unix(sddm-greeter:session): session closed for user sddm
Aug 23 11:54:15 hostname drkonqi-coredump-launcher[4961]: Unable to find file for pid 4854 expected at "kcrash-metadata/sddm-greeter-qt6.97d7df53b171482abb2d166a0b3166bc.4854.ini"
Aug 23 11:54:26 hostname abrt-notification[5043]: Process 4220 (sddm-greeter-qt6) crashed in QtPrivate::lcNativeInterface() [clone .cold]()
░░ Subject: ABRT has detected unexpected termination: sddm-greeter-qt6
░░ sddm-greeter-qt6 killed by SIGABRT

```