Create a JobObject when spawning a runtime on Windows

[pwalski]

ya-provider does not support any process groups / jobs on Windows

yagna/utils/process/src/lib.rs

Line 66 in f189dae

self

Maybe we should move Windows process Job related code from ya-runtime-ai to some lib and use it in ya-provider?

https://github.com/golemfactory/ya-runtime-ai/blob/d5683703359165543c116e7c55e679a71a7e2c74/src/main.rs#L290

It could be moved into dedicated crate in lets say exe-unit/components/proc together with this module https://github.com/golemfactory/yagna/tree/staszek/gamerhash-combined/exe-unit/components/counters/src/os/process because it always looked odd there (and ya-counters will use ya-proc when os feature id enabled).

Originally posted by @pwalski in #108

Implementing it will allow to avoid having a remaining ya-runtime-ai process when ya-provider gets killed but GH facade stays alive.