Add new rust crates

[RubenRBS]

This adds Subtle #4449 and Rayon #3927

[partouf]

They seem to have been built, but they do not appear here yet https://conan.compiler-explorer.com/libraries_rust.html because that page doesn't know it's rust yet because the properties have not been merged yet.

Most do appear here https://conan.compiler-explorer.com/libraries.html and it looks ok I think.

Eyre does not work however https://conan.compiler-explorer.com/getlogging/20221217055651 it seems to require something pythonish (python does get installed on the builder https://github.com/compiler-explorer/library-builder/blob/main/Dockerfile#L34)
Let's leave that one out for now

[partouf]

I think here's the instructions for building pyo3 correctly, but it's a bit wall of texty https://github.com/PyO3/pyo3/blob/101ac1b78d5ef13f834f211bc1ad95624a433f98/guide/src/building_and_distribution.md

[partouf]

maybe it's just a matter of setting PYO3_PYTHON?