Update to CMake build

[SeanBryan51]

The CABLE build system was transitioned from Makefile to CMake: see CABLE-LSM/CABLE#216, CABLE-LSM/CABLE#200. This change adds support for building CABLE via CMake in benchcab so that CABLE versions which branch from the HEAD of main can be tested.

Closes #258

[codecov]

Codecov Report

Attention: Patch coverage is 38.88889% with 11 lines in your changes are missing coverage. Please review.

Project coverage is 71.22%. Comparing base (59910ed) to head (8d41929).
Report is 1 commits behind head on main.

Files	Patch %	Lines
src/benchcab/model.py	25.00%	9 Missing ⚠️
src/benchcab/benchcab.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #278      +/-   ##
==========================================
- Coverage   72.81%   71.22%   -1.59%     
==========================================
  Files          18       18              
  Lines         982      966      -16     
==========================================
- Hits          715      688      -27     
- Misses        267      278      +11     

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[SeanBryan51]

I've decided not to add unit tests for Model.build() as the functionality is environment dependent and would involve a lot of unpleasant mocking. The integration test shows that the model builds successfully.

[ccarouge]

Should we remove support for the old build systems at the same time? It isn't strictly necessary for this PR but wouldn't it make things nicer for us? Bringing the old build systems to CMake might not take that much time now that we have a working example to use in main.

[SeanBryan51]

@ccarouge if you are referring to the custom build via the build_script key, I think I'd prefer to leave that as is for now as I would like to push a release which includes the changes in this PR. Deprecating that functionality would be major change and should require bumping the major version - we can probably save this for when spack comes around?

[Whyborn]

Looks fine to me, although I really don't know enough about the benchcab inner workings to give a detailed review.

[ccarouge]

I'm wondering if we are breaking the custom build script support but I'm not sure.

[ccarouge]

LGTM