Add CPU affinity to executed processes

[utam0k]

opencontainers/runtime-spec#1253

[keisku]

Hi, I am looking for an opportunity to contribute to youki and this issue looks interesting!
If my understanding is correct, we can use the runc code, startCommandWithCPUAffinity() that calls sched_setaffinity(2), as a reference.

Can I give this task a try?

[utam0k]

@keisku Thanks! I'll assign you. I'm looking forward to your PR ;)

[utam0k]

@keisku Hi, Keisuke. Do you need some help?

[keisku]

@utam0k thanks for heads up! I was waiting for opencontainers/runtime-spec#1253 to be merged. Now I am able to work on this issue. When I need some help, I will reach out to you 🙇

[keisku]

@utam0k FYI, I created youki-dev/oci-spec-rs#174 to import execCPUAffinity from youki.