Support GHC2024 (fixes #9736)

Cabal-syntax/src/Language/Haskell/Extension.hs

Cabal-tests/tests/UnitTests/Distribution/Utils/Structured.hs

Cabal/src/Distribution/Simple/GHC/ImplInfo.hs

Cabal/src/Distribution/Simple/GHC/Internal.hs

...stall/src/Distribution/Client/Init/Interactive/Command.hs

...l/tests/UnitTests/Distribution/Client/Init/Interactive.hs

changelog.d/issue-9736

doc/buildinfo-fields-reference.rst

doc/cabal-package-description-file.rst

editors/vim/syntax/cabal.vim