debian: update packaging for new build system (#71292)

debian/control

@@ -3,8 +3,12 @@ Section: web
 Priority: optional
 Maintainer: Frédéric Péters <fpeters@entrouvert.com>
 Build-Depends: debhelper-compat (= 12),
+               dh-python,
                inkscape,
                python3,
+               python3-all,
+               python3-django,
+               python3-setuptools,
                sassc (>= 3.4.2),
 Standards-Version: 3.9.4
 Homepage: http://git.entrouvert.org/publik-base-theme.git
@@ -13,6 +17,7 @@ Package: publik-base-theme
 Architecture: all
 Depends: python3-gadjo,
          ${misc:Depends},
+         ${python3:Depends},
          ${shlibs:Depends},
 Conflicts: python-authentic2 (<< 2.1.20.742.gb6ee096-0),
            python-django (<= 1:1.11),

debian/rules

@@ -9,8 +9,9 @@
 # Uncomment this to turn on verbose mode.
 #export DH_VERBOSE=1
 
-%:
-	dh $@
+export PYBUILD_NAME=publik-django-templatetags
+export PYBUILD_DISABLE=test
 
-override_dh_auto_build:
-	dh_auto_build --no-parallel
+
+%:
+	dh $@ --with python3 --buildsystem=pybuild