Retrieving file metadata on Windows now uses GetFileInformationByHandle not GetFileAttributesEx

…ller, r=petrochenkov

Apply track_caller to closure on `expect_non_local()`

r? `@petrochenkov`

Alternatively we could remove the closure by replicating the same logic of `map_id()`. I'm happy to switch to it if you'd like.

Diagnose anonymous lifetimes errors more uniformly between async and regular fns

Async fns and regular fns are desugared differently.  For the former, we create a generic parameter at HIR level.  For the latter, we just create an anonymous region for typeck.

I plan to migrate regular fns to the async fn desugaring.

Before that, this PR attempts to merge the diagnostics for both cases.

r? ```@estebank```

…=Mark-Simulacrum

Stabilize `box_into_pin`

FCP has been completed: rust-lang#62370 (comment)
Also, adds notes as per rust-lang#62370 (comment)
Closes rust-lang#62370

…stage-2, r=davidtwco

Migrate more diagnostics to use the `#[derive(SessionDiagnostic)]`

r? ``@davidtwco``

…ction, r=GuillaumeGomez

Arc make_mut doc comment spelling correction.

Fix file metadata documentation for Windows

I noticed that the documentation for `fs::symlink_metadata()` and `fs::metadata()` is incorrect; [the underlying code](https://github.com/rust-lang/rust/blob/481db40311cdd241ae4d33f34f2f75732e44d8e8/library/std/src/sys/windows/fs.rs#L334) calls [`GetFileInformationByHandle()`](https://docs.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-getfileinformationbyhandle) on Windows, not [`GetFileAttributesEx()`](https://docs.microsoft.com/en-us/windows/win32/api/fileapi/nf-fileapi-getfileattributesexw). There are currently [no uses of `GetFileAttributesEx()` in this repo](https://github.com/rust-lang/rust/search?q=GetFileAttributesEx).