chore: disable fourmolu in some files

- `where`-clause in combination with CPP causes a parse error

Author: geo2a

ouroboros-consensus/src/ouroboros-consensus/Ouroboros/Consensus/Storage/ImmutableDB/Chunks/Internal.hs

@@ -1,3 +1,5 @@
+{- FOURMOLU_DISABLE -}
+
 {-# LANGUAGE CPP #-}
 {-# LANGUAGE DeriveAnyClass #-}
 {-# LANGUAGE DeriveGeneric #-}