Update CI workflows in upstream projects using passagemath's reusable workflows

[mkoeppe]

Continuation of sagemath/sage#33338

Deployments of the passagemath portability CI and wheel-building workflows

and other integrations in upstream projects

Upstream project	Status	Update
4ti2/4ti2		4ti2/4ti2#45 (2025-04)
ComboProblem/pplitepy
dimpase/primecountpy
discopt/cmr		2025-04
flintlib/python-flint		2024-02
fplll/fpylll
ipython/ipython (sagemath-repl)		ipython/ipython#14317
kimwalisch/primecount		needs update
kimwalisch/primesieve	removed by upstream
latte-int/latte		2025-04
linbox-team/fflas-ffpack		linbox-team/fflas-ffpack#412 (2025-05)
mesonbuild/meson-python	replaced by handwritten Dockerfiles in mesonbuild/meson-python#241	2022-12
Normaliz/Normaliz		Normaliz/Normaliz#435 (2025-04)
Normaliz/PyNormaliz
🐙 passagemath/fflas-ffpack
🐙 passagemath/giac
🐙 passagemath/LiDIA
🐙 passagemath/linbox
🐙 passagemath/passagemath
🐙 passagemath/saclib
🐙 passagemath/topcom
pypa/setuptools		pypa/setuptools#4203
sagemath/cypari2
sagemath/cysignals
sagemath/sage
sagemath/sage-numerical-backends-coin
scipopt/SCIP-SDP		scipopt/SCIP-SDP#20
Singular/Singular		Singular/Singular#1270 (2025-04)
sympy/sympy

• unmerged PRs to add:
  • CI: Add portability and integration tests with Sage flintlib/flint#1760
  • CI: Add integration testing with Sage mpmath/mpmath#727
  • GH Actions workflow for continuous integration and portability testing fricas/fricas#102
  • ci-sage.yml: Use https://trac.sagemath.org/ticket/34106 flintlib/arb#434
  • CI: Portability tests for building on various Linux distributions and macOS scipopt/PySCIPOpt#630
  • .github/workflows/ci-sage.yml: New milahu/gnumake-tokenpool#12
  • Add portability CI chriswestbrown/saclib#3