Updated some Jacobi extension Interop buffers to OptiXBuffers.
Updated additional InteropBuffer usages.
Finished updating base ElVis and Jacobi extension to use OptiXBuffer.
Updated Nektar++ extension to use OptiX only interop buffers.
Added the definition to CUdeviceptr.
Fixed error loading a Nektar++ model.
Fixed Nektar++isosurfaces and volume rendering.
Fixed Nektar++ tests.
Cleaned up extension files.
Removed InteropBuffer
Merge branch 'AllOptixDev' into AllOptix