cpython: add python3.dll to the install for wheels

[Marc-Pierre-Barbier]

Summary

Changes to recipe: cpython/* to improve compatiblity with wheels.

Motivation

I was struggling with the prebuilt cryptography pypi package that was failing with the following error:

>>> import paramiko
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\ANSYSDev\SpeosOneConan\build\Release\venv\3.10.16\lib\site-packages\paramiko\__init__.py", line 22, in <module>
    from paramiko.transport import (
  File "C:\ANSYSDev\SpeosOneConan\build\Release\venv\3.10.16\lib\site-packages\paramiko\transport.py", line 33, in <module>
    from cryptography.hazmat.primitives.ciphers import algorithms, Cipher, modes
  File "C:\ANSYSDev\SpeosOneConan\build\Release\venv\3.10.16\lib\site-packages\cryptography\hazmat\primitives\ciphers\__init__.py", line 11, in <module>
    from cryptography.hazmat.primitives.ciphers.base import (
  File "C:\ANSYSDev\SpeosOneConan\build\Release\venv\3.10.16\lib\site-packages\cryptography\hazmat\primitives\ciphers\base.py", line 10, in <module>
    from cryptography.hazmat.bindings._rust import openssl as rust_openssl
ImportError: DLL load failed while importing _rust: The specified module could not be found.

After spending a while debugging I found out that the _rust.pyd file was trying to load python3.dll which is the stable interface required by some wheels.

Details

Added "--include-stable" to the arguments of layout/main.py to supply the file.

This include add the python3.dll right next to the python3xx.dll

---

• Read the contributing guidelines
• Checked that this PR is not a duplicate: list of PRs by recipe
• Tested locally with at least one configuration using a recent version of Conan (2.15.0)

[Marc-Pierre-Barbier]

the pr was tested on my machine and using our rocky8 pipelines. It does add properly the python3.dll which is then used by our wheel pulled from our pypi repository.

This pr should be ready.