Auto merge of #145601 - jieyouxu:rollup-t5mbqhc, r=jieyouxu

Rollup of 10 pull requests

Successful merges:

 - rust-lang/rust#145538 (bufreader::Buffer::backshift: don't move the uninit bytes)
 - rust-lang/rust#145542 (triagebot: Don't warn no-mentions on subtree updates)
 - rust-lang/rust#145549 (Update rust maintainers in openharmony.md)
 - rust-lang/rust#145550 (Avoid using `()` in `derive(From)` output.)
 - rust-lang/rust#145556 (Allow stability attributes on extern crates)
 - rust-lang/rust#145560 (Remove unused `PartialOrd`/`Ord` from bootstrap)
 - rust-lang/rust#145568 (ignore frontmatters in `TokenStream::new`)
 - rust-lang/rust#145571 (remove myself from some adhoc-groups and pings)
 - rust-lang/rust#145576 (Add change tracker entry for `--timings`)
 - rust-lang/rust#145578 (Add VEXos "linked files" support to `armv7a-vex-v5`)

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

Author: bors