The configure script doesn't allow running ASan with PyMalloc

Bug report

Bug description:

The --with-address-sanitizer configure option overrides whatever pymalloc option one provides which it should not.

We should either allow it to work with --with-pymalloc, or, delete the line that disables pymalloc. I discussed it a bit during EP2025 sprint with @encukou .

This is done due to the line here:
https://github.com/python/cpython/blame/4a151cae3317ce133bdf0792fb1064c5030e588c/configure#L13352

I believe that CPython works fine with ASan + PyMalloc. I have tested it by removing the line above. Then the import _testcapi; _testcapi.WITH_PYMALLOC is True and there doesn't seem to be ASan crashes. However, there are leaks being detected, even when building Python, so I did all this with export ASAN_OPTIONS=detect_leaks=0.

It is also worth noting that we:

1. List the --without-pymalloc flag in the devguide when showing how to run ASan.
2. We mention there, that the flag is not necessary, but it makes ASan more effective.
3. We mention in CPython docs that it makes sense to disable PyMalloc when running ASan here

CPython versions tested on:

CPython main branch

Operating systems tested on:

No response

まず、13352行目付近の configure スクリプトと、関連する --with-address-sanitizer および --with-pymalloc の処理を調べます。両方のオプションを指定して CPython をビルドし、_testcapi.WITH_PYMALLOC を確認したうえで、リンクされている devguide とメモリドキュメント、および文書化された detect_leaks 設定を考慮しながら、結果として得られる ASan の動作を検証します。