Use make test in CI

[currocam]

As we agreed yesterday, here's a minimal PR using make test in the CI. I have also modified the Cmake file to also run the Eidos test suite from the Eidos executable (to match previous CI).

[bhaller]

Perfect, thanks @currocam!

If you want another project (lol), as you can see the macos-13 CI is failing (and always has, when I have tried it before) because conda is not installed by GitHub Actions any more on macos CI builds, starting with macos-13 (see, e.g., actions/runner-images#9262; you can find many discussions of this in Google, their decision to remove it broke a ton of builds). The weird thing is that our CI .yaml already has its own script to install conda, with a whole caching mechanism and such, so conda ought to be there even though GitHub Actions no longer installs it for us. But it isn't, apparently; I have no idea why, and debugging this kind of thing is very much not my forté. :-> If this sounds like something you can figure out, I'd appreciate the help! The issue is here: #454. But if not, no worries. Thank you very much for your help with this make test issue!

[currocam]

I've done some work git GitHub Actions before, so I might give it a try!

Perfect, thanks @currocam!

If you want another project (lol), as you can see the macos-13 CI is failing (and always has, when I have tried it before) because conda is not installed by GitHub Actions any more on macos CI builds, starting with macos-13 (see, e.g., actions/runner-images#9262; you can find many discussions of this in Google, their decision to remove it broke a ton of builds). The weird thing is that our CI .yaml already has its own script to install conda, with a whole caching mechanism and such, so conda ought to be there even though GitHub Actions no longer installs it for us. But it isn't, apparently; I have no idea why, and debugging this kind of thing is very much not my forté. :-> If this sounds like something you can figure out, I'd appreciate the help! The issue is here: #454. But if not, no worries. Thank you very much for your help with this make test issue!