Add editor check for extension version and update module C++ flags replacement

[HKunogi]

After the commit on godot engine they changed how the compiler is detected and changed where the C++ flags are defined, this update the SCSub to keep on track with it. Also adds the SOTA_ENGINE define on the editor build case for the extension build method. Also for preview visual studio versions gotta wait this issue to get solved to allow for the build, which should be done soon.

[ardazishvili]

Thanks for patch!