audio/musescore: update to 4.1.0, latest release

All of the audio-backend options have gone away -- I don't see
MuseScore searching for them, either, and do not feel like digging
too far into the configure-and-build of this package either.
It bundles all kinds of stuff, where the most-worstest culprits
are dealt with in post-stage: why this installs Google Test headers
I really don't know.