Add holesky fork version to charon

[LukeHackett12]

🎯 Problem to be solved

Charon will need to be able to support Holesky testnet when it is released.

🛠️ Proposed solution

Once the Holesky fork version and genesis timestamp are known, add a new network var here and add it to supported networks.

	Holesky = Network{
		ChainID: 17000,
		Name: "holesky",
		GenesisForkVersionHex: "0x00017000",
		GenesisTimestamp: 1694786400,
	}

Also enable --network=holesky as an option for create dkg & create cluster commands.

🧪 Tests

• Tested by new automated unit/integration/smoke tests
• Manually tested on core team/canary/test clusters
• Manually tested on local compose simnet

[LukeHackett12]

added params based on the eth-clients repo, backed up by https://github.com/sigp/lighthouse/blob/stable/common/eth2_network_config/built_in_network_configs/holesky/config.yaml

[OisinKyne]

Looks like the params have been added, including the extradata being removed https://github.com/eth-clients/holesky