Allow unicode class names

[dsnopek]

Depends on PR godotengine/godot#96501

[dsnopek]

This will fail tests until the upstream Godot PR is merged

[dsnopek]

Hrm. Compiling locally, the tests work fine. However, on GitHub Actions, both GCC and MSVC don't like the UTC-8 identifiers in the C++ code. I tried setting the LANG and LC_ALL environment variables, hoping that would help with the GCC on Linux builds, but it had no effect.

This will need some more research to figure out!

[Repiteo]

After some local testing, it appears that the gcc used in CI is the culprit. Changing runs-on to ubuntu-latest eliminates that error entirely. I'm having no luck on identifying where/when this bug was actually fixed, just that the gcc used in ubuntu-20.04 has the bug.

No comment on the CMake equivalents, not familiar enough with that buildsystem.

[dsnopek]

Thanks! I updated to Ubuntu 22.04, which we're using in the static checks already, and that fixes the Linux/GCC builds.

I'm testing out some flags to fix the MSVC build.

[dsnopek]

Huzzah! The MSVC flag I tried is working, so this is now fully passing tests :-)