Many new test suite failures with Python 3.11 on Debian/Ubuntu

[juliangilbey]

Hi! I have lots (16 to be precise) of test failures when running the test suite with pydevd 2.9.2 (patched with PR #239) on Debian. These at least partially match those appearing on the Ubuntu Python 3.11 CI run.
These are the tests that newly fail (I already exclude those that I've reported before):

FAILED tests_python/test_debugger.py::test_case_django_a
FAILED tests_python/test_debugger.py::test_case_qthread1
FAILED tests_python/test_debugger.py::test_case_qthread2
FAILED tests_python/test_debugger.py::test_case_qthread3
FAILED tests_python/test_debugger.py::test_case_qthread4
FAILED tests_python/test_debugger.py::test_multiprocessing_simple[_debugger_case_python_c.py]
FAILED tests_python/test_debugger.py::test_subprocess_quoted_args[_debugger_case_quoting.py]
FAILED tests_python/test_debugger.py::test_subprocess_quoted_args[_debugger_case_subprocess_zip.py]
FAILED tests_python/test_debugger.py::test_remote_debugger_multi_proc[True]
FAILED tests_python/test_debugger.py::test_remote_debugger_multi_proc[False]
FAILED tests_python/test_debugger_json.py::test_subprocess_pydevd_customization[]
FAILED tests_python/test_debugger_json.py::test_subprocess_pydevd_customization[--use-c-switch]
FAILED tests_python/test_debugger_json.py::test_subprocess_pydevd_customization[--posix-spawn]
FAILED tests_python/test_debugger_json.py::test_subprocess_then_fork
FAILED tests_python/test_debugger_json.py::test_no_subprocess_patching[True]
FAILED tests_python/test_debugger_json.py::test_logging_api

For the time being, I'll just have to exclude these tests, but it's clear that something is going wrong, and pydevd may well not yet work properly on this platform with Python 3.11.

Thanks for your time on this!