Add support for new cost models representation in Alonzo genesis file

[mkoura]

OS
Your OS: Fedora 37

Versions
The db-sync version: d062074, 13.1.0.2
PostgreSQL version: 14.6

Build/Install Method
The method you use to build or install cardano-db-sync: nix build

Run method
The method you used to run cardano-db-sync (eg Nix/Docker/systemd/none): none

Problem Report
In PR IntersectMBO/cardano-node#5013, the cost model format changed to list, like

{
  "costModels": {
    "PlutusV1": [
      205665,
      812,
      1,
      1,
      1000,
      ...

db-sync currently don't support this new format, and fails to start with:

Failed reading Alonzo genesis file "./state-cluster0/shelley/genesis.alonzo.json": There was an error parsing the genesis file: ./state-cluster0/shelley/genesis.alonzo.json Error: Error in $.costModels.PlutusV1: parsing Map ~Text failed, expected Object, but encountered Array

[kderme]

Fixed with #1403