Arch Linux

- If you run Arch Linux in a container and install a cargo subcommand (let's say `cargo-clone`) then `cargo` itself is not installed. Which means you need to run `cargo-clone clone` to actually run the binary. It gets even worse if the package depends on the `cargo` binary somehow - which you might guess that it doesn't work properly in this case. So, for the sake of UX and properly have the Rust toolchain, I would say we should add `cargo` to `depends` array for every cargo subcommand.

- Some of the cargo packages (e.g. `cargo-udeps`) needs `rustup` at runtime instead of `cargo`, so we should identify those packages and update the PKGBUILDs accordingly to depend on `rustup`.