perftest doesn't work with python 3.12

[wrmay]

Here is the error. It occurs when running "perftest --help"

Traceback (most recent call last):
File "/Users/rmay/Documents/projects/hazelcast-simulator/bin/../src/perftest_cli.py", line 6, in
from simulator.perftest import PerftestCreateCli, PerftestCloneCli, PerftestRunCli,
File "/Users/rmay/Documents/projects/hazelcast-simulator/src/simulator/perftest.py", line 19, in
import simulator.util
File "/Users/rmay/Documents/projects/hazelcast-simulator/src/simulator/util.py", line 11, in
import pkg_resources
File "/Users/rmay/Documents/projects/hazelcast-simulator/venv/lib/python3.12/site-packages/pkg_resources/init.py", line 2191, in
register_finder(pkgutil.ImpImporter, find_on_path)
^^^^^^^^^^^^^^^^^^^
AttributeError: module 'pkgutil' has no attribute 'ImpImporter'. Did you mean: 'zipimporter'?

I haven't had time to dig for the root cause but it works with python 3.11.