Consider Wanteds with rewriters as not-insoluble
This MR fixes #25325 (closed)
See GHC.Tc.Types.Constraint, Note [Insoluble Wanteds], especially (IW2)
This MR fixes #25325 (closed)
See GHC.Tc.Types.Constraint, Note [Insoluble Wanteds], especially (IW2)