MR51: Allow Matplotlib to use system qhull >= 7.2.0 #31148
Description
zlscherr (@zlscherr) opened a merge request at https://gitlab.com/sagemath/sage/-/merge_requests/51:
My system has qhull 8.0.0 installed. Because Matplotlib
doesn't know about my system qhull it builds its own version.
This can cause runtime issues with Matplotlib trying to call
the wrong qhull library. For example, this fixes the error that
```bash
$ ./sage -tp 8 --long src/sage/plot/plot3d/list_plot3d.pyproduces
QH6249 qh_lib_check: Incorrect qhull library called.
Size of qhT for caller is 2896, but for library is 2792.
QH6256 qh_lib_check: Cannot continue.
Library 'qhull 7.2.0 (2015.2 2016/01/18)'
uses a static qhT (e.g., libqhull.so)if the system has qhull 8.0.0 installed.
Depends on #31128
CC: @slel
Component: **build**
Author: **Zachary Scherr**
Branch/Commit: **[`6a36667`](https://github.com/sagemath/sagetrac-mirror/commit/6a3666745f6c0ce268f142a8c6ae984ec4ff4dff)**
Reviewer: **Dima Pasechnik**
_Issue created by migration from https://trac.sagemath.org/ticket/31148_