[bug] asyncore deprecation

[xanimo]

On an M2 with python 3.12 installed one encounters an error with regards to asyncore which is utilized in mininode.py (asyncore is deprecated and fully removed in this version of python):

bluezr@lmao dogecoin % ./qa/pull-tester/rpc-tests.py --coverage                  
Initializing coverage directory at /var/folders/jz/v7ct3pb126n5bl1cln4h5jcm0000gn/T/coverageo3u8ggcm


p2p-fullblocktest.py:

stderr:
Traceback (most recent call last):
  File "/Users/bluezr/source/repos/dogecoin/qa/rpc-tests/p2p-fullblocktest.py", line 9, in <module>
    from test_framework.comptool import TestManager, TestInstance, RejectResult
  File "/Users/bluezr/source/repos/dogecoin/qa/rpc-tests/test_framework/comptool.py", line 6, in <module>
    from .mininode import *
  File "/Users/bluezr/source/repos/dogecoin/qa/rpc-tests/test_framework/mininode.py", line 28, in <module>
    import asyncore
ModuleNotFoundError: No module named 'asyncore'