COMP: Remove Fortran and LAPACK

[allemangD]

Update SPHARM-PDM and GROUPS to remove dependency on Fortran and LAPACK.

https://github.com/slicersalt/SPHARM-PDM/commits/slicersalt-2023-02-06-dfde14b72

https://github.com/slicersalt/GROUPS/commits/slicersalt-2023-02-06-037ab7dcd

Note that the SPHARM-PDM fork and SHA should be updated after NIRALUser/GROUPS#44 is merged.

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Compared results on the hippocampus sample data; maximum absolute distance between correspondent points is 0.00075 (total length is 92.2; something like 1e-6 relative tolerance). Computed via model-to-model distance module.

I will continue to test on more data and post results here; but I am confident that there are no glaring errors in the Eigen translation.

[bpaniagua]

lgtm

[allemangD]

I ran SPHARM on the correspondence improvement dataset; the tolerance is not so good on the hourglass example.

You can see the maximum absolute deflection from the lapack output is 0.65; a relative tolerance of about 5e-3.

Here's an axis aligned anterior view.

I'll try switching the solver which SPHARM uses to HouseholderQR as mentioned in NIRALUser/SPHARM-PDM#81 to see if this improves the tolerance.

Visually, the eigen output looks the same as the lapack output.

[allemangD]

Tolerance is slightly better with HouseholderQR, but not significantly (0.56 maximum deflection vs 0.65).

[allemangD]

I ran the test on the entireity of the tricuspid valve leaflets dataset; maximum point-to-point deflection across the whole dataset is 0.014, but mean is 0.000 (MeshStatistics doesn't output more than 3 decimals).

Worth noting that outlier is a single point in a single case. The mean and stddev across the dataset are both 0.000.

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Overall I'm confident switching to Eigen doesn't introduce any regressions. I believe the next effort should be integrating the scripts I developed to do these deflection analyses into integration tests for the SPHARM-PDM module, so that as refactoring continues we can be sure no regressions are introduced.

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I will merge NIRALUser/GROUPS#44 and NIRALUser/SPHARM-PDM#81, update git tags, and finally merge this PR.