Bundled spidermonkey fails to build with python 3.12

Description:

"The vendored six and urllib3 needs to be updated to support python 3.12, a patch landed for sm-120 upstream.

​https://phabricator.services.mozilla.com/rMOZILLACENTRAL47b8e4dba076af433fe0755cfc02497cdaa6f346

There might be a long tail of commits to cherry-pick first for this patch to apply."

Additional info:

• package version: a26-12
• config and/or log files: below
• link to upstream bug report: Upstream issue: https://trac.wildfiregames.com/ticket/6895

Steps to reproduce:

1. Try to build
2. Error

/build/0ad/src/0ad-0.0.26-alpha/libraries/source/spidermonkey/mozjs-78.6.0/python/mozbuild/mozbuild/configure/__init__.py:838: SyntaxWarning: invalid escape sequence '\.'
  RE_MODULE = re.compile('^[a-zA-Z0-9_\.]+$')
Traceback (most recent call last):
  File "/build/0ad/src/0ad-0.0.26-alpha/libraries/source/spidermonkey/mozjs-78.6.0/build-debug/../js/src/../../configure.py", line 25, in <module>
    from mozbuild.configure import (
  File "/build/0ad/src/0ad-0.0.26-alpha/libraries/source/spidermonkey/mozjs-78.6.0/python/mozbuild/mozbuild/configure/__init__.py", line 13, in <module>
    from six.moves import builtins as __builtin__
ModuleNotFoundError: No module named 'six.moves'
ERROR: SpiderMonkey build failed
==> ERROR: A failure occurred in build().
    Aborting...