Changes to HsRecField'

This is a sub-task of issue #19463.

• Rename HsRecField' to HsFieldBind
• Change its definition to:

  type instance XXHsFieldBind (GhcPass _) = NoExtCon
  
  data HsFieldBind p lhs rhs =
      HsFieldBind {
        hfbAnn :: XHsFieldBind lhs,
        hfbLHS    :: lhs,
        hfbRHS    :: rhs,           -- ^ Filled in by renamer when punning
        hfbPun    :: Bool           -- ^ Note [Punning]
     }
     | XHsFieldBind !(XXHsFieldBind p)
  
  type HsRecField p arg = HsFieldBind p (LFieldOcc p) arg

• This changes XHsRecField to XHsFieldBind
• hsRecFieldLbl now renamed hfbLHS no longer includes Located in its defn
• Update call-sites (Located) moves to the call-sites):
  • HsRecField
  • HsRecUpdField
  • RecProj p arg (for the interim until eliminated in a later pass)
  • After this one assumes these Locateds should be replaced with XRec p