feat(docker): custom network support

[mattevans]

• Updates config and install wizard screens to allow config of custom docker network if runMethod == docker.
• Updates existing validation to ensure beacon node health check only for host level nodes.
• Fixes issue where you could not 'Go Back' from the install wizard beacon config view.
• Updates compose file to handle custom network
• Creates appropriate default network on docker.Start() and subsequently tears it down on Stop().

How to test

There is integrations tests for this, using test containers, but to manually test.

1. Spin up kurtosis.
2. Configure dockerNetwork as per kurtosis network name (usually your enclave name, eg: kt-matty-testnet).
3. Configure your beaconNodeAddress as the CL node container name (eg: http://cl-1-lighthouse-nethermind--6cbd17feef8c43488af7582614edbf54:4000). Use the containers exposed port, now we're using a custom docker network.
4. Profit.