Merge pull request #260769 from athre0z/mullvad-gui-nixos-ozone-wl

mullvad-vpn: respect `NIXOS_OZONE_WL`

pkgs/applications/networking/mullvad-vpn/default.nix

···
     wrapProgram $out/bin/mullvad-daemon \
         --set-default MULLVAD_RESOURCE_DIR "$out/share/mullvad/resources"
 
+    wrapProgram $out/bin/mullvad-gui \
+      --add-flags "\''${NIXOS_OZONE_WL:+\''${WAYLAND_DISPLAY:+--enable-features=UseOzonePlatform --ozone-platform=wayland}}"
+
     sed -i "s|Exec.*$|Exec=$out/bin/mullvad-vpn $U|" $out/share/applications/mullvad-vpn.desktop
 
     runHook postInstall