Meta-ticket: Fix dependencies of upstream Python packages

[mkoeppe]

Various Python packages that we use do not declare their dependencies correctly using python packaging metadata.

This is not visible in a standard build of the Sage distribution because we manually manage dependencies using Sage-specific dependency information. But it becomes problematic as we move toward using standard Python infrastructure in #29705.

On this ticket we track the upstream issues.

• pplpy: https://gitlab.com/videlec/pplpy/-/issues/23 and https://gitlab.com/videlec/pplpy/-/issues/27
• fpylll: Add install_requires to setup.py/setup.cfg, or add pyproject.toml fplll/fpylll#185
• cypari2: Needs pyproject.toml to declare build-time dependency on cysignals cypari2#93

Depends on #31025

CC: @videlec @malb @tobiasdiez @dimpase

Component: packages: standard

Keywords: sd111

Issue created by migration from https://trac.sagemath.org/ticket/30922

[mkoeppe]

comment:1

Hoping we can make progress on this ticket this week - https://wiki.sagemath.org/days111

[mkoeppe]

Changed keywords from none to sd111

[mkoeppe]

Dependencies: #31025

[videlec]

comment:3

pplpy 0.8.6 is released on PyPI. It declares (hopefully) correctly its dependencies.

[mkoeppe]

comment:4

#31261 - pplpy

[mkoeppe]

comment:6

Moving this ticket to 9.4, as it seems unlikely that it will be merged in 9.3, which is in the release candidate stage