ND Spline Evaluator

[tretre91]

This PR adds a SplineEvaluatorND class working in any number of dimensions. Currently, the template arguments to the class and to the methods are passed using TypeSeqs, and the aliases alias_1, alias_2, etc are replaced by templated equivalents alias<0>, alias<1>, etc.

The tests for this are just the 3D spline test and one of the 1D spline test modified to use the ND evaluator. We might want to factorize some of the test code or use the same test files with some #ifdefs to enable the ND or regular Evalutor

[codecov]

Codecov Report

❌ Patch coverage is 77.27273% with 15 lines in your changes missing coverage. Please review.
✅ Project coverage is 91.41%. Comparing base (23760f3) to head (cb175b3).

Files with missing lines	Patch %	Lines
...nclude/ddc/kernels/splines/spline_evaluator_nd.hpp	76.56%	10 Missing and 5 partials ⚠️

❌ Your patch check has failed because the patch coverage (77.27%) is below the target coverage (100.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #967      +/-   ##
==========================================
- Coverage   91.76%   91.41%   -0.35%     
==========================================
  Files          57       58       +1     
  Lines        2756     2820      +64     
  Branches      924      954      +30     
==========================================
+ Hits         2529     2578      +49     
- Misses        136      146      +10     
- Partials       91       96       +5     

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[tpadioleau]

You also need to declare the new header file in the target_sources to make the installation test pass