Cleanup utest macro implementation

[nicolasstucki]

No description provided.

[liufengyun]

LGTM

Is the motivation to avoid capturing of Quotes?

[nicolasstucki]

It is just an antipattern that leads to use of Term instead of Expr. It also introduces some additional complications when doing the inference of QCtx. If it does not infere the precise one the errors the user gets are hard to understand.

It also makes that abstraction non-contextual which breaks if you use it within a splice with a different context.