Now that we use a CMakePresets.json file for CI, it makes sense to
support users having their own presets in a CMakeUserPresets.json file.
From CMake documentation:
> CMakePresets.json may be checked into a version control system, and
> CMakeUserPresets.json should NOT be checked in. For example, if a
> project is using Git, CMakePresets.json may be tracked, and
> CMakeUserPresets.json should be added to the .gitignore.
