Auto merge of #121188 - GuillaumeGomez:rollup-bejz7fq, r=GuillaumeGomez

Rollup of 6 pull requests

Successful merges:

 - #119928 (suggest `into_iter()` when `Iterator` method called on `impl IntoIterator`)
 - #121020 (Avoid an ICE in diagnostics)
 - #121111 (For E0038, suggest associated type if available)
 - #121137 (Add clippy into the known `cfg` list)
 - #121179 (allow mutable references in const values when they point to no memory)
 - #121181 (Fix an ICE in the recursion lint)

r? `@ghost`
`@rustbot` modify labels: rollup