TTG Pull AbsBinds and ABExport out of the main AST

AbsBinds and ABExport both depended on the typechecker, and were thus
removed from the main AST Expr.

CollectPass now has a new function `collectXXHsBindsLR` used for the new
HsBinds extension point

Bumped haddock submodule to work with AST changes.

The removed Notes from Language.Haskell.Syntax.Binds were duplicated
(and not referenced) and the copies in GHC.Hs.Binds are kept (and
referenced there). (See #19252)