…laumeGomez

Rollup of 8 pull requests

Successful merges:

 - rust-lang#86230 (Add --nocapture option to rustdoc)
 - rust-lang#87210 (Rustdoc accessibility: make the sidebar headers actual headers)
 - rust-lang#87227 (Move asm! and global_asm! to core::arch)
 - rust-lang#87236 (Simplify command-line argument initialization on unix)
 - rust-lang#87251 (Fix "item info" width)
 - rust-lang#87256 (Extend HIR-based WF checking to associated type defaults)
 - rust-lang#87259 (triagebot shortcut config)
 - rust-lang#87268 (Don't create references to uninitialized data in `List::from_arena`)

Failed merges:

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

…lacrum

Prepare 1.54.0 release

This PR builds the stable artifacts for the 1.54.0 release. Backports included:

* rust-lang#86696
*  rust-lang#87167
* rust-lang#87210

I was *not* able to cherry-pick rust-lang#87390 as that didn't apply cleanly to the stable branch. `@GuillaumeGomez` `@notriddle` could it be possible to get a PR targeting `stable` backporting that fix?

Also, this **enables** incremental compilation on the stable channel.

r? `@Mark-Simulacrum`
cc `@rust-lang/release`

Closes rust-lang#87828 
The issue seems to stem from rust-lang#87210 where code headings were changed from a heading containing code to a heading with the `code-header` class. `rustdoc.css` was updated, but `ayu.css` was missed.

Fix heading colours in Ayu theme

Closes rust-lang#87828
The issue seems to stem from rust-lang#87210 where code headings were changed from a heading containing a `code` element to a heading with the `code-header` class. `rustdoc.css` was updated, but `ayu.css` was missed.

Fix heading colours in Ayu theme

Closes rust-lang#87828
The issue seems to stem from rust-lang#87210 where code headings were changed from a heading containing a `code` element to a heading with the `code-header` class. `rustdoc.css` was updated, but `ayu.css` was missed.

Fix heading colours in Ayu theme

Closes rust-lang#87828
The issue seems to stem from rust-lang#87210 where code headings were changed from a heading containing a `code` element to a heading with the `code-header` class. `rustdoc.css` was updated, but `ayu.css` was missed.