Allow running `cargo dev lint` on a package directory
Allows you run the local clippy in a specified directory, e.g. allowing
```sh
# Lint a ui-cargo test
cargo dev lint tests/ui-cargo/wildcard_dependencies/fail
# Lint some other project
cargo dev lint ~/my-project
```
The `target` directory is set to a tempdir which isn't ideal for medium/large projects as it would be compiled from scratch. This is to avoid cached clippy messages where you `cargo dev lint dir`, change something in clippy, and run `cargo dev lint dir` again
changelog: Dev: `cargo dev lint` can now be run on a package directory
01ea6241ae