feat: allow to specify Ethereum chain id

[daniel1302]

Issue

Currently bots are failing with the following errors on non ganache network:

time="2022-09-27T20:51:06.053505238Z" level=info msg=Version hash=no_hash_set version=no_version_set
time="2022-09-27T20:51:06.053571623Z" level=info msg="Initialised bot" name=b00
time="2022-09-27T20:51:06.248063852Z" level=info msg="Connected to data node" host="n01.stagnet3.vega.xyz:3007" service=DataNode state=READY
time="2022-09-27T20:51:06.563555896Z" level=fatal msg="Failed to create service" error="failed to initialise bots: failed to initialise bot 'b00': failed to start bot b00: failed to create token service: failed to create Ethereum client: failed to dial Ethereum client: websocket: bad handshake (HTTP status 400 Bad Request)"

[zale144]

In [email protected] I've added code that automatically gets the chainID:

chainID, err := client.ChainID(ctx)
if err != nil {
	return nil, fmt.Errorf("failed to get chain ID: %w", err)
}

[daniel1302]

Yess I just realised it later and updated that library