Auto merge of #102850 - JohnTitor:rollup-lze1w03, r=JohnTitor

Rollup of 8 pull requests

Successful merges:

 - #101118 (fs::get_mode enable getting the data via fcntl/F_GETFL on major BSD)
 - #102072 (Add `ptr::Alignment` type)
 - #102799 (rustdoc: remove hover gap in file picker)
 - #102820 (Show let-else suggestion on stable.)
 - #102829 (rename `ImplItemKind::TyAlias` to `ImplItemKind::Type`)
 - #102831 (Don't use unnormalized type in `Ty::fn_sig` call in rustdoc `clean_middle_ty`)
 - #102834 (Remove unnecessary `lift`/`lift_to_tcx` calls from rustdoc)
 - #102838 (remove cfg(bootstrap) from Miri)

Failed merges:

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

Author: bors

cargo-miri/src/main.rs

@@ -1,4 +1,3 @@
-#![cfg_attr(bootstrap, feature(let_else))]
 #![allow(clippy::useless_format, clippy::derive_partial_eq_without_eq, rustc::internal)]
 
 #[macro_use]

src/lib.rs

@@ -10,7 +10,6 @@
 #![feature(is_some_and)]
 #![feature(nonzero_ops)]
 #![feature(local_key_cell_methods)]
-#![cfg_attr(bootstrap, feature(let_else))]
 // Configure clippy and other lints
 #![allow(
     clippy::collapsible_else_if,