[CSL-447] Return `SleepForever` to `forever wait`
[CSL-447] Return `SleepForever` to `forever wait`

input-output-hk/pos-haskell-prototype,input-output-hk/cardano-sl,serokell/tw-rework-sketch,input-output-hk/pos-haskell-prototype,input-output-hk/cardano-sl,input-output-hk/cardano-sl,input-output-hk/cardano-sl,input-output-hk/pos-haskell-prototype