Auto merge of #142901 - matthiaskrgr:rollup-topt4p6, r=matthiaskrgr

Rollup of 5 pull requests

Successful merges:

 - rust-lang/rust#141597 (Document subdirectories of UI tests with README files)
 - rust-lang/rust#142823 (Port `#[no_mangle]` to new attribute parsing infrastructure)
 - rust-lang/rust#142828 (1.88.0 release notes)
 - rust-lang/rust#142854 (centralize `-Zmin-function-alignment` logic)
 - rust-lang/rust#142875 (Check rustdoc-json-types FORMAT_VERSION is correctly updated)

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

Author: bors

src/tests/ui.md

@@ -13,6 +13,11 @@ used for many other purposes. For example, tests can also be configured to [run
 the resulting program](#controlling-passfail-expectations) to verify its
 behavior.
 
+For a survey of each subdirectory's purpose under `tests/ui`, consult the
+[SUMMARY.md](https://github.com/rust-lang/rust/tree/master/tests/ui/SUMMARY.md).
+This is useful if you write a new test, and are looking for a category to
+place it in.
+
 If you need to work with `#![no_std]` cross-compiling tests, consult the
 [`minicore` test auxiliary](./minicore.md) chapter.