Remove bathymetry operator.
It is no longer necessary to apply bathymetry to a model's tessellation. Since the means of applying bathymetry to a mesh is handled by ElevateMesh, this MR deprecates ApplyBathymetry and its associated classes & tests.
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It is no longer necessary to apply bathymetry to a model's tessellation. Since the means of applying bathymetry to a mesh is handled by ElevateMesh, this MR deprecates ApplyBathymetry and its associated classes & tests.