Add Python 3.15 argparse ast and runtime updates

[JelleZijlstra]

Summary

Add Python 3.15 stdlib updates for argparse, array, ast, faulthandler, re, shelve, tarfile, unittest, warnings, and wave.

Relevant report entries

• Added argparse suggest_on_error and color parameters, changed the 3.15 suggest_on_error default, removed HelpFormatter(color=...), and added formatter parameters to ArgumentParser.format_usage(), format_help(), and _get_formatter() (CPython PR: gh-140448: Default suggest_on_error to True in argparse.ArgumentParser cpython#140450; source: https://github.com/python/cpython/blob/e81025e6d2e01e38c5a5b656af5739ac9df5ff55/Lib/argparse.py)
• Added array typecodes for half-precision and complex arrays and widened array.typecodes (CPython PRs: Support half-floats in the array module cpython#146238, Add support for numpy buffer format Zf and Zd cpython#148675; source: https://github.com/python/cpython/blob/main/Modules/arraymodule.c)
• Added ast.dump(color=...) (CPython PR: Add colour to ast.dump output cpython#148981; source: https://github.com/python/cpython/blob/main/Lib/ast.py)
• Added ast.Import.is_lazy and ast.ImportFrom.is_lazy for lazy imports (CPython source: https://github.com/python/cpython/blob/e81025e6d2e01e38c5a5b656af5739ac9df5ff55/Parser/Python.asdl)
• Added faulthandler max_threads parameters (CPython PR: faulthandler: make per-call thread dump cap configurable cpython#149085; source: https://github.com/python/cpython/blob/main/Modules/faulthandler.c)
• Added dbm.dumb._Database.reorganize, dbm.sqlite3.REORGANIZE, dbm.sqlite3._Database.reorganize, shelve.ShelveError, and shelve serializer/deserializer keyword-only parameters (CPython PRs: DBM Module Vacuuming cpython#134004, Custom unpickler and pickler for the shelve module  cpython#99631; sources: https://github.com/python/cpython/blob/main/Lib/dbm/dumb.py, https://github.com/python/cpython/blob/e81025e6d2e01e38c5a5b656af5739ac9df5ff55/Lib/dbm/sqlite3.py, https://github.com/python/cpython/blob/e81025e6d2e01e38c5a5b656af5739ac9df5ff55/Lib/shelve.py)
• Added re.prefixmatch and Pattern.prefixmatch (CPython PR: Proposal: re.prefixmatch method (alias for re.match) cpython#86519; source: https://github.com/python/cpython/blob/main/Lib/re/__init__.py)
• Added tarfile.TarFile.__init__(mtime=...) (CPython source: https://github.com/python/cpython/blob/e81025e6d2e01e38c5a5b656af5739ac9df5ff55/Lib/tarfile.py)
• Added unittest.TestCase.assertLogs(formatter=...) (CPython PR: Expose log format to users in assertLogs cpython#134567; source: https://github.com/python/cpython/blob/main/Lib/unittest/case.py)
• Added warnings.WarningMessage(module=...) and .module attribute (CPython source: https://github.com/python/cpython/blob/e81025e6d2e01e38c5a5b656af5739ac9df5ff55/Lib/_py_warnings.py)
• Added wave.WAVE_FORMAT_IEEE_FLOAT, getformat, setformat, and 7-field params; removed marker methods for 3.15 (CPython PRs: wave file module does not support 32bit float format cpython#60729, Remove deprecated mark interface for wave.Wave_{read,write} classes cpython#133873; source: https://github.com/python/cpython/blob/main/Lib/wave.py)

[JelleZijlstra]

PEP 798

[JelleZijlstra]

I'm suspicious about this last overload, I think it allows some wrong calls through. But we already have the same for match(), so I'll leave it like this for now.

[hauntsaninja]

should we just do prefixmatch = match? that's basically the impl

[JelleZijlstra]

true

[hauntsaninja]

don't we usually "backport" deprecations? wondering if this can just be a single if sys.version_info <= (3, 13) branch (similar thing above as well)

[JelleZijlstra]

Might as well.

[github-actions]

According to mypy_primer, this change has no effect on the checked open source code. 🤖🎉