Fix inclusion/exclusion of optional dependencies

[kersson]

Follow-up to #2235 that corrects the DependencyKind used. This bug caused optional dependencies to be incorrectly included even no feature activated that dependency. This can lead to crates being compiled with missing features, resulting in compile errors.

For example, sqlx==0.7.3 compiled successfully with 0.30.0, but fails with 0.31.0:

sqlx = { version = "0.7.3", default-features = false, features = ["sqlite"] }

because default-features = false should remove the optional dependency sqlx-macros. Instead, however, it gets incorrectly included but with its crate dependencies' features missing, resulting in compile errors.

Related issue:

• Missing crate features when Cargo.toml specifies default-features = false #2262

[illicitonion]

Oops, thanks!