`missing_trait_methods`: lint methods in definition order
Lintcheck for #13157 showed a bunch of changes for `missing_trait_methods`
This is because `values_sorted` was sorting the entries by the key's [`DefPathHash`](https://doc.rust-lang.org/nightly/nightly-rustc/rustc_span/def_id/struct.DefPathHash.html), this is stable for a given compiler but can change across versions
changelog: none