Avoid monolithic functions which take tons of parameters in stdpar functions

[brycelelbach]

https://github.com/gpuhackathons-org/gpubootcamp/blob/c357a6b0b50a57fabaa699d0a0e5b49700f66b19/hpc/nways/nways_labs/nways_MD/English/C/source_code/stdpar/rdf.cpp#L24-L26

In modern C++, we generally prefer to encapsulate related things in structs when passing parameters. The signature of this function should be reorganized to take fewer parameters.