This script is somewhat usable by humans (it even has a help screen!)
and can be reused in //users/sterni/nixpkgs-crate-holes. We are using
bash since that allows us to exit with the actual exit code of
cargo-audit - something that's not possible in execline.
Change-Id: I3331ae8222a20e23b8e30dc920ab48af78f0247c
Reviewed-on: https://cl.tvl.fyi/c/depot/+/5228
Tested-by: BuildkiteCI
Reviewed-by: Profpatsch <mail@profpatsch.de>