Auto merge of #107343 - JohnTitor:rollup-s6l94aj, r=JohnTitor

Auto merge of #107343 - JohnTitor:rollup-s6l94aj, r=JohnTitor

Rollup of 8 pull requests

Successful merges:

 - #105784 (update stdarch)
 - #106856 (core: Support variety of atomic widths in width-agnostic functions)
 - #107171 (rustc_metadata: Fix `encode_attrs`)
 - #107242 (rustdoc: make item links consistently use `title="{shortty} {path}"`)
 - #107279 (Use new solver during selection)
 - #107284 (rustdoc: use smarter encoding for playground URL)
 - #107325 (rustdoc: Stop using `HirId`s)
 - #107336 (rustdoc: remove mostly-unused CSS classes `import-item` and `module-item`)

Failed merges:

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