Implements the MTLIndirectAccelerationStructureInstanceDescriptor struct, the MTLIndirectInstanceAccelerationStructureDescriptor struct with all its setter functions. Also implements fetching an acceleration structure's GPU resource id, since we need that to fill in the MTLIndirectAccelerationStructureInstanceDescriptor
Implements the
MTLIndirectAccelerationStructureInstanceDescriptorstruct, theMTLIndirectInstanceAccelerationStructureDescriptorstruct with all its setter functions. Also implements fetching an acceleration structure's GPU resource id, since we need that to fill in theMTLIndirectAccelerationStructureInstanceDescriptor