bug(tmp): nuke mta-plumed for a bit

[HaoZeke]

The nuclear option. @pfebrer we should merge this one in today if #195 can't be resolved soon (but @Luthaf is taking a look so let's hold off until the end of the day).

[HaoZeke]

obviously the intent is to revert this later, so:

git revert 9ee3c09483c17dd62673c1fea9a322526bca4bba
# make real fixes here
git commit . -m "feat(mtaplumed): fixed annoying cross version bug"
git push
# request review & profit

[github-actions]

Here is the build version of the cookbook in this pull request: documentation.zip, you can view it locally by unzipping documentation.zip and open the index.html with your favorite browser.

[Luthaf]

ok, I think we can merge this for now, I don't understand what's wrong with the example. It looks like some kind of repeatable memory corruption, making plumed try to execute the model with per_atom=True, even when loading the model from Python or C++ the capabilities are properly set with per_atom = false.