Auto merge of #122483 - matthiaskrgr:rollup-n07dsh5, r=matthiaskrgr

Rollup of 9 pull requests

Successful merges:

 - #104353 (Add CStr::bytes iterator)
 - #119676 (rustdoc-search: search types by higher-order functions)
 - #120699 (Document `TRACK_DIAGNOSTIC` calls.)
 - #121899 (Document how removing a type's field can be bad and what to do instead)
 - #122405 (Add methods to create StableMIR constant)
 - #122416 (Various style improvements to `rustc_lint::levels`)
 - #122421 (Improve `Step` docs)
 - #122440 (const-eval: organize and extend tests for required-consts)
 - #122461 (fix unsoundness in Step::forward_unchecked for signed integers)

Failed merges:

 - #122397 (Various cleanups around the const eval query providers)

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

tests/pass/shims/time-with-isolation2.stdout

@@ -1 +1 @@
-The loop took around 7s
+The loop took around 12s