Update to state support for Python 3.13

[rht]

[EwoutH]

Thanks! I notice there's a warning that source directly from Python 3.13's multiprocessing, it might be nice to resolve that first.

tests/test_batch_run.py::test_batch_run_no_agent_reporters
  /opt/hostedtoolcache/Python/3.13.0-rc.1/x64/lib/python3.13/multiprocessing/popen_fork.py:67: DeprecationWarning: This process (pid=2042) is multi-threaded, use of fork() may lead to deadlocks in the child.
    self.pid = os.fork()