message: doc: Move buried deployment doc to the enum that enumerates them
  This is more visible than a comment hidden in an RPC helper function.
diff: namespace Consensus {
  -enum BuriedDeployment : int16_t
  -{
  +/**
  + * A buried deployment is one where the height of the activation has been hardcoded into
  + * the client implementation long after the consensus change has activated. See BIP 90.
  + */
  +enum BuriedDeployment : int16_t {
  // buried deployments get negative values to avoid overlap with DeploymentPos
  DEPLOYMENT_HEIGHTINCB = std::numeric_limits<int16_t>::min(),
  DEPLOYMENT_CLTV,
  @@ -22,8 +25,7 @@ enum BuriedDeployment : int16_t
  };
  constexpr bool ValidDeployment(BuriedDeployment dep) { return DEPLOYMENT_HEIGHTINCB <= dep && dep <= DEPLOYMENT_SEGWIT; }
  -enum DeploymentPos : uint16_t
  -{
  +enum DeploymentPos : uint16_t {
  DEPLOYMENT_TESTDUMMY,
  DEPLOYMENT_TAPROOT, // Deployment of Schnorr/Taproot (BIPs 340-342)
  // NOTE: Also add new deployments to VersionBitsDeploymentInfo in deploymentinfo.cpp
  