GAP 4.12.1 fixes critical bugs in 4.12.0

GAP 4.12.1 release page

GAP 4.12.0 was released in August 2022.

• GAP 4.12.0 release announcement
• GAP 4.12.0 release page
• GAP 4.12.0: changes since GAP 4.11.1

We should upgrade our corresponding spkgs:

• gap
• gap_packages
• libsemigroups

Previous upgrades:

• upgrade GAP to 4.11.1 or newer #31498: GAP 4.11.1
• update GAP to version 4.11, libsemigroup to 1.0.9 #29314: GAP 4.11, libsemigroup 1.0.9

Upstream: Completely fixed; Fix reported upstream

CC: @antonio-rojas @dimpase @slel @tornaria @kiwifb @collares @tscrim

Component: packages: standard

Keywords: spkg, upgrade, gap, libsemigroups

Author: Antonio Rojas, Dima Pasechnik

Reviewer: Dima Pasechnik, Antonio Rojas, Mauricio Collares, François Bissey

Issue created by migration from https://trac.sagemath.org/ticket/34391