Adds CI configuration that builds the Rust package, and exports the package back
to Github after submits to canon.
Change-Id: I2f8dcff2a614898c55115f44510543ff25d46b55
Reviewed-on: https://cl.tvl.fyi/c/depot/+/12996
Autosubmit: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
Reviewed-by: thk <thomas@koch.ro>
