Add exports to GHC.Tc.Errors.Hole (fixes #19864)
This adds exports of the functions that had previously been exported, but were unexported during the reorganization of TcHoleErrors
into GHC.Tc.Errors.Hole
, as well as exporting some additional functions that were previously locally declared in where
clauses, but are generally useful when writing hole-fit plugins. Fixes #19864 (closed).