Auto merge of #141944 - matthiaskrgr:rollup-e7xhp6w, r=matthiaskrgr

Rollup of 8 pull requests

Successful merges:

 - rust-lang/rust#140715 (Clarify &mut-methods' docs on sync::OnceLock)
 - rust-lang/rust#141677 (Async drop - type instead of async drop fn, fixes rust-lang/rust#140484)
 - rust-lang/rust#141741 (Overhaul `UsePath`)
 - rust-lang/rust#141873 (Fixed a typo in `ManuallyDrop`'s doc)
 - rust-lang/rust#141876 (Don't declare variables in `ExprKind::Let` in invalid positions)
 - rust-lang/rust#141886 (Add missing 2015 edition directives)
 - rust-lang/rust#141889 (Add missing `dyn` keywords to tests that do not test for them)
 - rust-lang/rust#141891 (Fix borrowck mentioning a name from an external macro we (deliberately) don't save)

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