[WIP] feat: rust tests

[danielorihuela]

Description

Add automatic rust tests as part of the CI/CD and fix current problems. Close #20.

Checklist

• [x] I have followed the Contribution Guidelines and Code of Conduct
• [x] I have commented my code following the OpenMined Styleguide
• [x] I have labeled this PR with the relevant Type labels
• [x] My changes are covered by tests

[tholop]

@danielorihuela feel free to ping me on Slack (at Pierre Tholoniat) if you have any issues :slightly_smiling_face:

[danielorihuela]

@tholop Hi, yeah, I had some problems making the branches, but I found my way. I wanted to add the mac and windows tests, but I saw that you already started it. Anyway, I saw that there was a bug and I fixed it in https://github.com/OpenMined/sycret/pull/25. Any feedback is appreciated. It worked on a PR that I did to my fork -> https://github.com/danielorihuela/sycret/runs/3205499969

[tholop]

Great, thanks! Please request a review when you're ready and I'll have a look