allow-unwrap-in-tests (etc) do not work for integration tests / examples / benches

[Manishearth]

Clippy lets you do the following:

# Cargo.toml
[lints.clippy]
unwrap-used = true

# clippy.toml
allow-unwrap-in-tests = true

This stops code that is cfg(test) or #[test] from getting linted. However, this does not affect code in test/ (etc)., since that code isn't cfg(test).

is_in_test() probably should take that into account?

[nk9]

@rustbot label C-feature-request