Add DESTDIR and Cygwin support for mcqd #29148
Description
Implements #24024 + #22509 for the optional package mcqd.
Component: packages: optional
Keywords: destdir mcqd
Author: Erik Bray
Branch/Commit: 33ae2be
Reviewer: Matthias Koeppe
Issue created by migration from https://trac.sagemath.org/ticket/29148