Whitespace check not processing c++ files forrectly

[mwaxmonsky]

Is your feature request related to a problem? Please describe.
The current CI fails due to whitespace at the end of a c++ file (https://github.com/TURBO-ESM/TIM/actions/runs/22494930509/job/65166819596?pr=2).

Describe the solution you'd like
Given a fortran and c++ file with the same newline/whitespace at the end of the file, the CI behaves similarly.

Describe alternatives you've considered

Additional context

[alperaltuntas]

I suggest removing the lint_fms CI test, since we don't have any control over NOAA-GFDL/simple_lint. Instead, we can switch to using the trailer check from MOM6, which is more flexible and allows us to target specific directories.

See:

• MOM6/.testing/trailer.py
• MOM6/.github/workflows/verify-linux.yml (line 15: name: Check white space (non-blocking))

[mwaxmonsky]

Thanks @alperaltuntas! It turned out to be a PEBKAC issue and I was able to find the empty whitespace after further digging so this isn't a bug per se. But I have copied over the MOM6 whitespace checking and this should enable us to keep making progress now.