Restore removed Py_SetProgramName() and PySys_SetArgv() functions

[vstinner]

My Fedora team identified that the removal of "Python initialization" functions impacts at least 17 projects. I propose to restore them to give more time to impacted projects to be updated to the new PEP 587 PyConfig API added to Python 3.8.

These functions were marked as deprecated in Python 3.11.

Py_SetProgramName() and/or Py_SetPythonHome(), 7 impacted projects:

• dionaea
• fontforge
• glade
• libreoffice
• neuron
• python-pyqt6
• python-pyside6

PySys_SetArgv() and/or PySys_SetArgvEx(), 12 impacted projects (glade and neuron are both lists):

• collectd
• glade
• gnumeric
• kernel
• nautilus-python
• nemo-extensions
• neuron
• obs-studio
• pyotherside
• remmina
• scribus
• sourcextractor++

In Python 3.13, I also proposed PEP 741 – Python Configuration C API but it's still a draft.

Linked PRs

• gh-117987: Restore remove Py_SetProgramName() function #117993

[encukou]

Thank you! Every bit helps.