vici: Update Python build

Directly calling setup.py is deprecated (apparently has been for a while,
but now we get large warnings).  Direct installation is also discouraged.
So this removes that option.  The built wheel (the old egg format is not
used/built anymore) can be installed manually in a venv or the like.

src/libcharon/plugins/vici/python/.gitignore

@@ -1,3 +1,4 @@
+.eggs
 .tox
 *.pyc
 build

src/libcharon/plugins/vici/python/Makefile.am

@@ -16,29 +16,14 @@ $(srcdir)/setup.py: $(srcdir)/setup.py.in $(top_builddir)/config.status
 	-e "s:@EGG_VERSION@:$(PYTHON_PACKAGE_VERSION):" \
 	$(srcdir)/setup.py.in > $@
 
-all-local: dist/vici-$(PYTHON_PACKAGE_VERSION)-py$(PYTHON_VERSION).egg
+all-local: dist/vici-$(PYTHON_PACKAGE_VERSION)-py3-none-any.whl
 
-dist/vici-$(PYTHON_PACKAGE_VERSION)-py$(PYTHON_VERSION).egg: $(EXTRA_DIST) $(srcdir)/setup.py
-	(cd $(srcdir); $(PYTHON) setup.py bdist_egg \
-		-b $(shell readlink -f $(builddir))/build \
-		-d $(shell readlink -f $(builddir))/dist)
-
-package: $(EXTRA_DIST) $(srcdir)/setup.py
-	(cd $(srcdir); $(PYTHON) setup.py sdist \
-		-d $(shell readlink -f $(builddir))/dist \
-		bdist_wheel --universal \
-		-d $(shell readlink -f $(builddir))/dist)
+dist/vici-$(PYTHON_PACKAGE_VERSION)-py3-none-any.whl: $(EXTRA_DIST) $(srcdir)/setup.py
+	(cd $(srcdir); $(PYTHON) -m build -o $(abs_builddir)/dist)
 
 clean-local:
-	(cd $(srcdir); [ ! -f setup.py ] || $(PYTHON) setup.py clean -a)
 	rm -rf $(srcdir)/setup.py $(srcdir)/vici.egg-info $(builddir)/dist
 
-if PYTHON_EGGS_INSTALL
-install-exec-local: dist/vici-$(PYTHON_PACKAGE_VERSION)-py$(PYTHON_VERSION).egg
-	$(EASY_INSTALL) $(PYTHONEGGINSTALLDIR) \
-		dist/vici-$(PYTHON_PACKAGE_VERSION)-py$(PYTHON_VERSION).egg
-endif
-
 if USE_TOX
   TESTS_ENVIRONMENT += export TOX=$(TOX);
   AM_TESTS_FD_REDIRECT = 1>&2
@@ -48,5 +33,3 @@ endif
 if USE_PY_TEST
   TESTS = $(PY_TEST)
 endif
-
-.PHONY: package