ci: Install changes for repackaged pynipap

Some changes to the CI setup to accomodate repackeged pynipap:
 * Install pynipap using pip
 * Install build dependencies python3-build and pybuild-plugin-pyproject

.github/workflows/ci.yml

@@ -43,13 +43,15 @@ jobs:
           fakeroot \
           debhelper \
           dh-python \
+          pybuild-plugin-pyproject \
           junit4 \
           libldap-dev \
           libsasl2-dev \
           python3-docutils \
           python3-nose \
           python3-requests \
           python3-setuptools \
+          python3-build \
           python3-wheel \
           python3-all \
           default-jdk \
@@ -91,7 +93,7 @@ jobs:
         sudo nipap/nipap-passwd add -u unittest -p gottatest -n unittest
         sudo nipap/nipap-passwd add -u readonly -p gottatest --readonly -n "Read-only user for running unit tests"
         # install pynipap
-        cd pynipap; sudo python3 setup.py install; cd ..
+        cd pynipap; sudo -H pip3 install .; cd ..
         # install nipap-cli dependencies
         sudo -H pip3 install --break-system-packages -r nipap-cli/requirements.txt
         # start nipap backend