Downgrade some optional packages to experimental in Sage 9.7

[jhpalmieri]

The following don't currently build on various platforms — see https://github.com/sagemath/sage/actions/runs/2777704587:

• symengine_py Upgrade symengine, symengine_py, fix build #34141
• p_group_cohomology package modular_resolution: Split out from p_group_cohomology #30787
• r_jupyter
  The following don't build for me on OS X 12.5:
• polylib Update isl + polylib + barvinok packages #33758
• barvinok: depends on polylib
  This ticket downgrades these from optional to experimental.

Component: packages: optional

Author: John Palmieri

Branch/Commit: 43bda83

Reviewer: Matthias Koeppe

Issue created by migration from https://trac.sagemath.org/ticket/34291

[mkoeppe]

comment:1

rubiks is fixed in #34293

I agree that polylib can be downgraded to experimental. Then also barvinok should be downgraded because it depends on polylib.

[jhpalmieri]

Branch: u/jhpalmieri/downgrade-to-experimental

[jhpalmieri]

Author: John Palmieri

[jhpalmieri]

New commits:

43bda83

trac 34291: downgrade some broken optional packages to experimental

[jhpalmieri]

Commit: 43bda83

[mkoeppe]

Reviewer: Matthias Koeppe

[jhpalmieri]

comment:7

Thank you.

[vbraun]

Changed branch from u/jhpalmieri/downgrade-to-experimental to 43bda83