gtk initialization failed
Description of problem:
I compiled latest qemu version from sources with gtk enabled like below but still there is an issue of gtk initialization failed
   ```
   ./configure --enable-gtk --enable-slirp
   ```
Steps to reproduce:
1. building qemu from sources or installing from packages results with gtk initialization failed message
Additional information:
```
   # virt-host-validate
  QEMU: Checking for hardware virtualization                                 : PASS
  QEMU: Checking if device /dev/kvm exists                                   : PASS
  QEMU: Checking if device /dev/kvm is accessible                            : PASS
  QEMU: Checking if device /dev/vhost-net exists                             : PASS
  QEMU: Checking if device /dev/net/tun exists                               : PASS
  QEMU: Checking for cgroup 'cpu' controller support                         : PASS
  QEMU: Checking for cgroup 'cpuacct' controller support                     : PASS
  QEMU: Checking for cgroup 'cpuset' controller support                      : PASS
  QEMU: Checking for cgroup 'memory' controller support                      : PASS
  QEMU: Checking for cgroup 'devices' controller support                     : PASS
  QEMU: Checking for cgroup 'blkio' controller support                       : PASS
  QEMU: Checking for device assignment IOMMU support                         : WARN (No ACPI IVRS table found, IOMMU either disabled in BIOS or not supported by this hardware platform)
  QEMU: Checking for secure guest support                                    : WARN (Unknown if this platform has Secure Guest support)
   LXC: Checking for Linux >= 2.6.26                                         : PASS
   LXC: Checking for namespace ipc                                           : PASS
   LXC: Checking for namespace mnt                                           : PASS
   LXC: Checking for namespace pid                                           : PASS
   LXC: Checking for namespace uts                                           : PASS
   LXC: Checking for namespace net                                           : PASS
   LXC: Checking for namespace user                                          : PASS
   LXC: Checking for cgroup 'cpu' controller support                         : PASS
   LXC: Checking for cgroup 'cpuacct' controller support                     : PASS
   LXC: Checking for cgroup 'cpuset' controller support                      : PASS
   LXC: Checking for cgroup 'memory' controller support                      : PASS
   LXC: Checking for cgroup 'devices' controller support                     : PASS
   LXC: Checking for cgroup 'freezer' controller support                     : FAIL (Enable 'freezer' in kernel Kconfig file or mount/enable cgroup controller in your system)
   LXC: Checking for cgroup 'blkio' controller support                       : PASS
   LXC: Checking if device /sys/fs/fuse/connections exists                   : PASS
   ```
   ```
# apt list --installed | grep gtk
gir1.2-gtk-3.0/noble-updates,now 3.24.41-4ubuntu1.2 amd64 [installed,automatic]
gtk-update-icon-cache/noble-updates,now 3.24.41-4ubuntu1.2 amd64 [installed,automatic]
libavahi-ui-gtk3-0/noble,now 0.8-13ubuntu6 amd64 [installed,automatic]
libavahi-ui-gtk3-dev/noble,now 0.8-13ubuntu6 amd64 [installed]
libdecor-0-plugin-1-gtk/noble,now 0.2.2-1build2 amd64 [installed,automatic]
libgtk-3-0t64/noble-updates,now 3.24.41-4ubuntu1.2 amd64 [installed,automatic]
libgtk-3-bin/noble-updates,now 3.24.41-4ubuntu1.2 amd64 [installed,automatic]
libgtk-3-common/noble-updates,now 3.24.41-4ubuntu1.2 all [installed,automatic]
libgtk-3-dev/noble-updates,now 3.24.41-4ubuntu1.2 amd64 [installed,automatic]
   ```