deps: install setuptools on python 3.12+

distutils was removed beginning in Python 3.12, but it's used at
runtime by rethinkdb 2.4.9. setuptools provides a copy of distutils,
so we should make sure to install it when we're on Python 3.12 or
newer until we're able to upgrade to a version of rethinkdb that
no longer needs it.

See: https://www.python.org/downloads/release/python-3120/

Author: mistydemeo

setup.py

@@ -88,6 +88,9 @@ def find_package_data(package):
         "rethinkdb": [
             "rethinkdb==2.4.9",
             "doublethink==0.4.9",
+            # Needed because of rethinkdb 2.4.9;
+            # can be removed when we can upgrade to 2.4.10.post1
+            "setuptools>=75.8.0;python_version>='3.12'",
         ],
     },
     zip_safe=False,