Addition of two new governance related ledger state queries

[lehins]

It looks like users can benefit from accessing information related to ratification and enactment (see #4509). Therefore we need to add some ledger state queries:

1. - proposals that are considered for ratification, as well as their votes. This can be achieved in constant time without forcing the drep pulser by exposing those proposals through a ledger state query that looks into the DRepPulserState. In partuclar, depending on the pulser state it will return either psPorposals or dpProposals.
   We need to also add filtering capabilities by the GovActionId, similarly how we do filtering on other queries (i.e. empty input Set means no filtering)
2. - RatifyState, which is the result of invocation of RATIFY and ENACT ledger rules. This can be achieved by forcing the pulser:
   

   cardano-ledger/libs/cardano-ledger-api/src/Cardano/Ledger/Api/State/Query.hs

   Lines 312 to 316 in 88d7885

   	finishedPulserState ::
   	ConwayEraGov era =>
   	NewEpochState era ->
   	(PulsingSnapshot era, RatifyState era)
   	finishedPulserState nes = finishDRepPulser (nes ^. newEpochStateGovStateL . drepPulsingStateGovStateL)