Cargo binary dependencies remote cache

[aoudiamoncef]

We have only 3 building targets and a bunch of dependencies, we could improve build performance with caching. It's CPU(now) vs Bandwidth

Build cache

Cargo remote

sccache

[qdrn]

Could we use that to improve our CI ? We would probably need to pin the rust version.

Related: https://blog.nixbuild.net/posts/2022-03-16-lightning-fast-ci-with-nixbuild-net.html