Rodrigo Mesquita authored Mar 11, 2022 and Marge Bot committed Mar 18, 2022

When desugaring a bracket we want to desugar /renamed/ rather than
/typechecked/ code; So in (HsExpr GhcTc) tree, we must
have a (HsExpr GhcRn) for the quotation itself.

This commit reworks the TTG refactor on typed and untyped brackets by
storing the /renamed/ code in the bracket field extension rather than in
the constructor extension in `HsQuote` (previously called
`HsUntypedBracket`)

See Note [The life cycle of a TH quotation] and ghc/ghc!4782