Genesis transactions inconsistency

[mversic]

This is how genesis block is represented in the schema:

  "RawGenesisBlock": {
    "Struct": [
      {
        "name": "transactions",
        "type": "Vec<Vec<InstructionBox>>"
      },
      {
        "name": "validator",
        "type": "ValidatorMode"
      }
    ]
  }

First of all it's not composed of transactions, but of a double list of instructions. Either we should make it a single vector of instructions like this (notice rename from transactions -> instructions):

  "RawGenesisBlock": {
    "Struct": [
      {
        "name": "instructions",
        "type": "Vec<InstructionBox>"
      },
      {
        "name": "validator",
        "type": "ValidatorMode"
      }
    ]
  }

or we're going to use a proper transaction

  "RawGenesisBlock": {
    "Struct": [
      {
        "name": "transactions",
        "type": "Vec<VersionedSignedTransaction>"
      },
      {
        "name": "validator",
        "type": "ValidatorMode"
      }
    ]
  }

[mversic]

superseeded by #4225