Windows Installer test builds (freeciv-3.2 / msys2 / autotools)

[cazfi]

There's no longer any known regressions in meson based builds relative to autotools based builds. There's no need to make more snapshot builds with autotools. Thread about freeciv-3.2 meson based msys2 builds: https://forum.freeciv.org/f/viewtopic.php?t=92153