debian: add GUI runtime python deps under !nocheck

Adds the Python, Qt, GTK and typelib runtime deps needed for the
ui-smoke harness under tests/ui-smoke/ to actually exercise each
GUI's import path on CI. All gated with <!nocheck> so users building
with DEB_BUILD_OPTIONS=nocheck aren't penalised with the extra
packages.

Includes pyqt5 (+ qsci/qtsvg/qtopengl/qtwebengine/qtpy/dev-tools),
python3-dbus.mainloop.pyqt5, python3-cairo, python3-gi(+cairo),
gir1.2-gtk-3.0, gir1.2-gtksource-4, python3-numpy, python3-configobj,
xvfb and x11-xserver-utils.

Author: grandixximo

debian/control.top.in

@@ -48,6 +48,23 @@ Build-Depends:
     tk@TCLTK_VERSION@-dev,
     xvfb <!nocheck>,
     x11-xserver-utils <!nocheck>,
+    python3-opengl <!nocheck>,
+    python3-pyqt5 <!nocheck>,
+    python3-pyqt5.qsci <!nocheck>,
+    python3-pyqt5.qtsvg <!nocheck>,
+    python3-pyqt5.qtopengl <!nocheck>,
+    python3-pyqt5.qtwebengine <!nocheck>,
+    pyqt5-dev-tools <!nocheck>,
+    python3-dbus <!nocheck>,
+    python3-dbus.mainloop.pyqt5 <!nocheck>,
+    python3-qtpy <!nocheck>,
+    python3-cairo <!nocheck>,
+    python3-gi <!nocheck>,
+    python3-gi-cairo <!nocheck>,
+    gir1.2-gtk-3.0 <!nocheck>,
+    gir1.2-gtksource-4 <!nocheck>,
+    python3-numpy <!nocheck>,
+    python3-configobj <!nocheck>,
     libfmt-dev,
     yapps2
 Build-Depends-Indep: