python: replace distutils with setuptools

python: replace distutils with setuptools

Since 'distutils' will be removed in Python 3.12, use setuptools instead
to build the bindings. Thanks to the python devs that removed the only
facility to build native extensions from the core distribution.

See https://peps.python.org/pep-0632/

Change-Id: Ib515931d2352416bcc92e18be6b5a3981fb3f067
Signed-off-by: Michael Jeanson <mjeanson@efficios.com>
Reviewed-on: https://review.lttng.org/c/babeltrace/+/8846
Reviewed-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>
Reviewed-by: Simon Marchi <simon.marchi@efficios.com>
Tested-by: jenkins <jenkins@lttng.org>