fix(check): Use Cargo's colors

[epage]

With rustup checks colors being testable (#4561), this updates it to match Cargo's colors

[epage]

Looks like a hang in the build and CI needs to be re-kicked off

[epage]

Now a test failure that I can't reproduce

thread 'download::tests::reqwest::socks_proxy_request' panicked at src/download/tests.rs:179:13:
assertion `left == right` failed
  left: 0
 right: 1

[djc]

Suggest doing it more like this:

let (transient, error, good, warn) = match use_colors {
     true => (TRANSIENT, ERROR, GOOD, WARN),
     false => (Style::new(), Style::new(), Style::new(), Style::new()),
};