Allow different tools to be enabled/disabled

[barnabasbusa]

instead of

{
  "participants": [
    {
      "el_client_type": "geth",
      "el_client_image": "ethpandaops/geth:dencun-devnet-8",
      "cl_client_type": "lighthouse",
      "cl_client_image": "ethpandaops/lighthouse:deneb-free-blobs",
      "count": 4
    }
  ],
  "network_params": {
    "capella_fork_epoch": 2,
    "deneb_fork_epoch": 4,
    "num_validator_keys_per_node": 77
  },
  "launch_additional_services": true,
  "wait_for_finalization": false,
  "wait_for_verifications": false,
  "global_client_log_level": "info"
}

have something like this:

{
  "participants": [
    {
      "el_client_type": "geth",
      "el_client_image": "ethpandaops/geth:dencun-devnet-8",
      "cl_client_type": "lighthouse",
      "cl_client_image": "ethpandaops/lighthouse:deneb-free-blobs",
      "count": 4
    }
  ],
  "network_params": {
    "capella_fork_epoch": 2,
    "deneb_fork_epoch": 4,
    "num_validator_keys_per_node": 77
  },
  "launch_additional_services": ['el-forkmon','tx_fuzz' ...]
  "wait_for_finalization": false,
  "wait_for_verifications": false,
  "global_client_log_level": "info"
}