Auto merge of #107650 - compiler-errors:rollup-4pntchf, r=compiler-errors

Rollup of 8 pull requests

Successful merges:

 - #106887 (Make const/fn return params more suggestable)
 - #107519 (Add type alias for raw OS errors)
 - #107551 ( Replace `ConstFnMutClosure` with const closures )
 - #107595 (Retry opening proc-macro DLLs a few times on Windows.)
 - #107615 (Replace nbsp in all rustdoc code blocks)
 - #107621 (Intern external constraints in new solver)
 - #107631 (loudly tell people when they change `Cargo.lock`)
 - #107632 (Clarifying that .map() returns None if None.)

Failed merges:

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