Refactor AliasTy. AliasTerm & UnevaluatedConst to use Alias#156538

rust-bors[bot] merged 2 commits into

rust-lang:mainrust-lang/rust:mainfrom

Jamesbarford:chore/merge-AliasTy-AliasTermJamesbarford/rust:chore/merge-AliasTy-AliasTermCopy head branch name to clipboard