use libgap in simplicial_complex

<div id="comment:0"></div>

this is just a 1-line change.

A part of #26902

CC:  @jhpalmieri

Component: **algebraic topology**

Author: **Dima Pasechnik**

Branch/Commit: **[`1867190`](https://github.com/sagemath/sagetrac-mirror/commit/18671900baa942dd408cda82be6ebb4d995afed8)**

Reviewer: **John Palmieri**

_Issue created by migration from https://trac.sagemath.org/ticket/34769_

