Auto merge of #150575 - JonathanBrouwer:rollup-veh2d0h, r=JonathanBrouwer

Rollup of 4 pull requests

Successful merges:

 - rust-lang/rust#150382 (Tweak wording of diff marker diagnostic)
 - rust-lang/rust#150431 (test and document that `proc_macro::Ident` is NFC-normalized)
 - rust-lang/rust#150504 (Add regression test for issue rust-lang/rust#99173)
 - rust-lang/rust#150568 (Update triagebot config for `compiler-errors`, `tests/{run-make,run-make-cargo}` and `fallback` adhoc_group)

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