Bootstrap GSM tech debt

[nfrisby]

Taken from #808 (comment), upon clicking the "Merge when ready" button.

• s-r-p stanzas (see Add the pre-Genesis State Machine for bootstrap peers #808 (comment))
• Either move the GSM logic into the ChainDB and keep the GSM arguments as part of the ChainDB arguments (which would be encapsulated inside of openChainDB) or remove the argument from the ChainDB arguments and keep it as a NodeKernel-level thing.
• move the anti-thundering herd delay into the Diffusion Layer, between the two states CaughtUp and OnlyBootstrap
• regression tests (code review and ad-hoc manual testing has already evidenced that they're currently correct):
  • realMarkerFileView regression tests
  • initializationLedgerJudgement regression tests
  • realDurationUntilTooOld regression tests
  • The ChainSync client should signal idle exactly when and only when the MsgAwaitReply is processed.
  • The ChainSync client subsequently should signal no-longer-idle exactly when and only when the next message is received.
• switch to quickcheck-dynamic and/or upstream the io-sim-based QSM module #1149
• use ArbitraryLedgerStateJudgement from ouroboros-network:sim-tests-lib

[jasagredo]

• Either move the GSM logic into the ChainDB and keep the GSM arguments as part of the ChainDB arguments (which would be encapsulated inside of openChainDB) or remove the argument from the ChainDB arguments and keep it as a NodeKernel-level thing.