Updating Beatrice branch name & Enabling CD for testnet

Definition of Done

Updating Beatrice branch name to our testnet environment & Automatic deployments of witness node/cli wallet prior to merges into master

Create new testnet that is based off of ONLY the latest merge into the new testnet branch
Change name of Beatrice branch to - Testnet or something similar
Setup continuous deployment to deploy witness_node and cli_wallet to our testnet
Merges into the new testnet branch will automatically deploy the updated witness_node & cli_wallet
Automatic deployment will stop the current running witness_node, replace it with the new artifact & replay the chain

N/A