Python 3.13

[sklam]

This issue is to track tasks and issues with Python 3.13.

Numba support status:

• Started early work on Python3.13.0a3. So far, there is minimal bytecode changes (WIP branch: main...sklam:numba:wip/py3.13). We got numba/tests/test_usecases.py to pass. However, more involved tests are blocked by an issue with metaclass (Python 3.13.0a3 metaclass __call__ runs only once  python/cpython#114806). As a result, Type._code is not set properly. (temporary debug commit related to the issue: 4b6cc78)
• Added development setup using hatchery: Python 3.13 numba-hatchery#8
• Work is halted until 3.13.0a4 is available. Expected on Feb 13 2024.
• Work resumes using 3.13.0a6 as Python 3.13.0a3 metaclass __call__ runs only once  python/cpython#114806 is resolved. Continues to look into try-except changes 7/33 failures in test_try_except.py