libreoffice-qt: fix build

Broke in 408ece7d3d because the
`disallowedRequisites` fails here since the QT variant apparently needs
to reference a few dev outputs[1].

I won't look into the details of that now, so the easiest way to unbreak
is to skip the check for the QT variant. It should be kept for non-QT
though to make sure that a change similar to the BUILDCONFIG thing isn't
missed again by us.

[1] https://github.com/NixOS/nixpkgs/pull/245361#issuecomment-1651389735

    error: output '/nix/store/2y0czyy26gcsqhmcvd2mlqa35f0gcl4l-libreoffice-7.5.4.1' is not allowed to refer to the following paths:
             /nix/store/0hmvklj0mbhrn8flwbcwivvkv45limhg-freetype-2.13.0-dev
             /nix/store/0rnx7rc87hwkbrhsys7mgwq4jw6pz7ma-zlib-1.2.13-dev
             [...]

pkgs/applications/office/libreoffice/default.nix

@@ -226,9 +226,10 @@ in
   # in the binary causing the closure size to blow up because of many unnecessary
   # dependencies to dev outputs. This behavior was patched away in nixpkgs
   # (see above), make sure these don't leak again by accident.
-  disallowedRequisites = lib.concatMap
-    (x: lib.optional (x?dev) x.dev)
-    buildInputs;
+  disallowedRequisites = lib.optionals (!kdeIntegration)
+    (lib.concatMap
+      (x: lib.optional (x?dev) x.dev)
+      buildInputs);
 
   ### QT/KDE
   #