Make --chain-id flag consistent across commands

[przemerr]

Description

The --chainid in:
lisk-core keys:create --chainid <value> --output <path> --add-legacy
requires a decimal value of an actual chainid
i.e if the chain ID is 99000000 you need to input 153

the --chain-id in:
lisk-core transaction:create legacy registerKeys 10000000 --key-derivation-path=legacy --chain-id 99000000 --no-signature --sender-public-key=<pubkey>
requires a full ID of the chain
ie. if the chain ID is 99000000 you need to input 99000000

also one flag has a dash -, other doesn't

Motivation

To introduce less confusion, and avoid potential mistakes