gh-105716 breaks greenlet/eventlet

[doko42]

Bug report

Bug description:

gh-105716 breaks greenlet/eventlet, which apparently was working with the 3.12.0 release.
this is greenlet 3.0.1, plus eventlet 0.33.3 plus the python3.12 for eventlet taken from
https://src.fedoraproject.org/rpms/python-eventlet/tree/rawhide

Traceback (most recent call last):
  File "/home/packages/12/python-eventlet-0.33.3/tests/isolated/patcher_existing_locks_late.py", line 20, in <module>
    eventlet.monkey_patch()
  File "/home/packages/12/python-eventlet-0.33.3/eventlet/patcher.py", line 294, in monkey_patch
    modules_to_patch += modules_function()
                        ^^^^^^^^^^^^^^^^^^
  File "/home/packages/12/python-eventlet-0.33.3/eventlet/patcher.py", line 480, in _green_thread_modules
    from eventlet.green import threading
  File "/home/packages/12/python-eventlet-0.33.3/eventlet/green/threading.py", line 22, in <module>
    eventlet.patcher.inject(
  File "/home/packages/12/python-eventlet-0.33.3/eventlet/patcher.py", line 109, in inject
    module = __import__(module_name, {}, {}, module_name.split('.')[:-1])
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3.12/threading.py", line 40, in <module>
    _is_main_interpreter = _thread._is_main_interpreter
                           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: module 'eventlet.green.thread' has no attribute '_is_main_interpreter'

---
FAIL

CPython versions tested on:

3.12

Operating systems tested on:

Linux

Linked PRs

• [3.12] gh-112826: Fix the threading Module When _thread is Missing _is_main_interpreter() #112850
• gh-112826: Add a "What's New" Entry About _thread._is_main_interpreter #112853

[ericsnowcurrently]

Thanks for bringing this to my attention. I'll take a look.

[ericsnowcurrently]

FTR:

original PR: gh-112661
3.12 backport: gh-110707

[ericsnowcurrently]

@Yhg1s, should this block 3.12.1? I expect to have a fix up shortly.