No rewards for staking pool delegation

[mikekeke]

To make slot length and epoch size configurable in plutip, module Cluster.hs was brought (copy-pasted) from cardano-wallet local cluster framework into plutip. After this was done receiving rewards for staking pool delegation stopped working.

Changes in Cluster.hs are minimal and should not affect rewards. But if cluster launch performed with original Cluster.hs rewards starts working again. It's not yet clear what is broken.

Branch forked from master, where cluster launch reverted back to use module from cardano-wallet and rewards are working:
plutip-debug
8e26b47

Where it breaks in master:
dc5c9440fe2a66d533f383bd6f6477ad764da1f9 - works
650e796dffc1ac502311260a56f6f67f2cf80dcf - does not

[klntsky]

For context: here's a skipped test that reproduces this:

https://github.com/Plutonomicon/cardano-transaction-lib/blob/0576feabc1c7ec03eceb0d65a09fec4b26939322/test/Plutip/Staking.purs#L380