Use build to create distributions (#2160)

Instead of calling setup.py. This fixes the name of built distributions
to match pep625, i.e. elastic_apm instead of elastic-apm

Author: xrmx

dev-utils/make-packages.sh

@@ -3,14 +3,10 @@
 # Make a Python APM agent distribution
 #
 
-echo "::group::Install wheel"
-pip install --user wheel
+echo "::group::Install build"
+pip install --user build
 echo "::endgroup::"
 
-echo "::group::Building universal wheel"
-python setup.py bdist_wheel
-echo "::endgroup::"
-
-echo "::group::Building source distribution"
-python setup.py sdist
+echo "::group::Building packages"
+python -m build
 echo "::endgroup::"