Rollup merge of #155352 - Enselic:label-sync, r=Mark-Simulacrum

triagebot.toml: Sync `assign.owners` with `autolabel."T-compiler"`

In `autolabel."T-compiler"`, several `./tests/*` dirs are listed.

But many of them are missing from `assign.owners`. Add them all to `assign.owners` so reviewers are picked from the compiler group, and not from the small `assign.adhoc_groups.fallback` group.

Discovered in https://github.com/rust-lang/rust/pull/153941#issuecomment-4065145752.

CC fallback group @Mark-Simulacrum @jieyouxu who can maybe confirm that the old setup was not intentional? (Edit: I hope it was not intentional, because in that case I should have reached out to you personally beforehand.)