OSPRay v2.10.0

• Add support for primitive, object, and instance ID buffers as
  framebuffer channels
• Support face-varying attributes for Mesh and Subdivision geometry
• Replace CMake variable OSPRAY_PIXELS_PER_JOB by
  OSPRAY_RENDER_TASK_SIZE; variance tracking for adaptive
  accumulation is now per task instead of per tile, allowing for more
  granular adaptation
• OSPRay now requires minimum Open VKL v1.3.0 to bring the following
  improvements:
  • VDB volumes added support for contiguous data layouts, which can
    provide improved performance (nodesPackedDense,
    nodesPackedTile parameters)
  • Particle volumes are more memory efficiency and improved
    performance
• OSPRay now requires minimum ISPC v1.18.0 for Open VKL and to include
  a fix for parallel dispatch of uniform function pointers
• MPI Offload: resolve object life time tracking issue that would
  result in framebuffer and data info being release too early, leading
  to a crash
• Fix crash with OpenMPI due to argument handling
• Fix clipping when rays are parallel to clipping planes
• Fix missing SDK headers from CPU and MPI module
• Deprecated the vec2f valueRange parameter of the piecewiseLinear
  transfer function, use box1f value instead