Auto merge of #128835 - matthiaskrgr:rollup-apzlbxy, r=matthiaskrgr

Rollup of 7 pull requests

Successful merges:

 - #128306 (Update NonNull::align_offset quarantees)
 - #128612 (Make `validate_mir` ensure the final MIR for all bodies)
 - #128648 (Add regression test)
 - #128749 (Mark `{f32,f64}::{next_up,next_down,midpoint}` inline)
 - #128795 (Update E0517 message to reflect RFC 2195.)
 - #128825 (rm `declared_features` field in resolver)
 - #128826 (Only suggest `#[allow]` for `--warn` and `--deny` lint level flags)

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