Change the way chain_id is retrieved

Merge after: !249 (merged)

This MR:

1. Removed --chain-id option from the CLI
2. Place chain-id in a every profile context
3. Make chain-id configurable via the clive configure chain-id command
4. Set the default chain id for mainnet and embedded testnet (Still could be changed via CLI)
5. When chain-id is not set (via default or unset via CLI, etc..) - when first required, it will be retrieved from the node get_config API call and set to profile context chain_id to that value.