test: add default-config-macro smoke test

This uses an AI generated python script to diff the contents of the bots
field of the default configuration file and the
data/meta/default-config.yaml file. It emits a patch showing what needs
to be changed.

Signed-off-by: Xe Iaso <me@xeiaso.net>

test/default-config-macro/test.sh

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+cd "$(dirname "$0")"
+python3 -c 'import yaml'
+python3 ./compare_bots.py