List database plans

Example response

{
  "service_types": [
    {
      "type": "pg",
      "latest_version": "18.6",
      "componentised": true,
      "zones": [
        "fi-hel1",
        "de-fra1"
      ],
      "backup_tiers": [
        "regular",
        "extended"
      ],
      "node_counts": [
        1,
        2,
        3
      ],
      "compute_shapes": [
        {
          "compute": "rdb.standard.2CPU-8GB",
          "family": "standard",
          "cpu": 2,
          "memory_gb": 8,
          "dynamic_storage_supported": true,
          "node_counts": [
            1,
            2,
            3
          ],
          "backups": [
            "regular"
          ],
          "storage": {
            "step_gib": 10,
            "dynamic_max_multiplier": 4,
            "total_cap_gib": 10240,
            "options": [
              {
                "base_gib": 80,
                "max_gib": 400
              }
            ]
          }
        }
      ]
    }
  ]
}