Auto merge of #160980 - JonathanBrouwer:rollup-MX1XSgM, r=JonathanBrouwer

Rollup of 6 pull requests

Successful merges:

 - rust-lang/rust#160966 (bootstrap: Avoid some unnecessary imports from the crate root)
 - rust-lang/rust#159987 (trait solver: Track canonical response universe assumptions)
 - rust-lang/rust#160886 (Trim `GoalStalledOn::Certainty`)
 - rust-lang/rust#160925 (Add `TypeId::is_signed` method)
 - rust-lang/rust#160926 (sve: add addl. passing test for field projection)
 - rust-lang/rust#160977 (Remove `MutatingUseContext::Retag`)