Auto merge of #156506 - JonathanBrouwer:rollup-sOIgP3l, r=JonathanBrouwer

Rollup of 6 pull requests

Successful merges:

 - rust-lang/rust#156287 (move more compiler crates away from `box_patterns` )
 - rust-lang/rust#156428 (Move `std::io::Cursor` to `core::io`)
 - rust-lang/rust#156431 (Move `std::io::util` to `core::io`)
 - rust-lang/rust#156145 (Move tests cast)
 - rust-lang/rust#156284 (resolve: Fix a false positive "cannot reexport" error for ambiguous glob sets)
 - rust-lang/rust#156502 (Give an example of a Ctor in the doc-comments)