Rectangular update

[dzalkind]

This PR collects a lot of the open-source developments required for the EAB case studies, including:

• Modeling rectangular members in HydroDyn and SubDyn
• A new hybrid potential_model_override method using potential model for only radiation and excitation (not bouyancy)
• New load cases (force-displacement, free decay, user-defined wind)
• Improved DLC 1.2 support, using probability clusters

Things left TODO:

• [x] Elevate potential_model_override option above RAFT as it affects both RAFT and OpenFAST
• [x] Add various flavors of VolturnUS modeling (rectangular, SubDyn, hybrid)
• [x] Add fatigue example
• [x] Organize pre-processing notebooks (fatigue, orcaflex translator)
• [x] Test all new DLC cases
• [x] Fix SubDyn generation, ElastoDyn mass needs to be zeroed
• [x] Check heave of models
• [ ] Check WEIS-generated models against develop branch

Purpose

This PR updates WEIS to generate HydroDyn and SubDyn files for rectangular members. The SubDyn update also applies to circular members.

Type of change

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• [x] New feature (non-breaking change which adds functionality)

Testing

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Checklist

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• [ ] I have run existing tests which pass locally with my changes
• [ ] I have added new tests or examples that prove my fix is effective or that my feature works
• [ ] I have added necessary documentation