Auto merge of #155687 - GuillaumeGomez:rollup-aZ7YrAD, r=GuillaumeGomez

Rollup of 7 pull requests

Successful merges:

 - rust-lang/rust#155469 (Account for titlecase in casing lints)
 - rust-lang/rust#155644 (delegation: support self ty propagation for functions in free to trait reuse)
 - rust-lang/rust#154957 (Fix ICE when const closure appears inside a non-const trait method)
 - rust-lang/rust#155442 (Change keyword order for `impl` restrictions)
 - rust-lang/rust#155561 (Use singular wording for single _ placeholders in type suggestions)
 - rust-lang/rust#155637 (Fix E0191 suggestion for empty dyn trait args)
 - rust-lang/rust#155661 (Remove `AttributeLintKind` variants - part 6)