Implement cardano-config migrate

[jasagredo]

Migrates from this:

to this:

Renames some fields:

renamedFields =
  [ -- gRPC local-connection keys (were named Rpc)
    ("EnableRpc", "EnableGrpc")
  , ("RpcSocketPath", "GrpcSocketPath")
  , -- Deadline peer targets (gained the Deadline prefix)
    ("TargetNumberOfRootPeers", "DeadlineTargetNumberOfRootPeers")
  , ("TargetNumberOfKnownPeers", "DeadlineTargetNumberOfKnownPeers")
  , ("TargetNumberOfEstablishedPeers", "DeadlineTargetNumberOfEstablishedPeers")
  , ("TargetNumberOfActivePeers", "DeadlineTargetNumberOfActivePeers")
  , ("TargetNumberOfKnownBigLedgerPeers", "DeadlineTargetNumberOfKnownBigLedgerPeers")
  , ("TargetNumberOfEstablishedBigLedgerPeers", "DeadlineTargetNumberOfEstablishedBigLedgerPeers")
  , ("TargetNumberOfActiveBigLedgerPeers", "DeadlineTargetNumberOfActiveBigLedgerPeers")
  ]

acceptedConnectionsLimitFields :: [(Text, Text)]
acceptedConnectionsLimitFields =
  [ ("hardLimit", "HardLimit")
  , ("softLimit", "SoftLimit")
  , ("delay", "Delay")
  ]

Removes some other fields:

removedFields =
  [ "PBftSignatureThreshold"
  , "LastKnownBlockVersion-Major"
  , "LastKnownBlockVersion-Minor"
  , "LastKnownBlockVersion-Alt"
  , "Protocol"
  , "MaxKnownMajorProtocolVersion"
  ]

tracingObsoleteKeys :: [Text]
tracingObsoleteKeys =
  [ "UseTraceDispatcher"
  , "TurnOnLogging"
  , "TurnOnLogMetrics"
  , "defaultBackends"
  , "defaultScribes"
  , "setupBackends"
  , "setupScribes"
  , "minSeverity"
  , "options"
  ]

[dnadales]

Thank you for implementing these improvements!