[build] Target Mainnet for Develop Image
I'm setting up a node that will run on the latest image from develop
and be reset daily from the latest statesync snapshot, alerting if it hits a consensus failure. This will change the image registry.gitlab.com/thorchain/thornode:develop
to be built for mainnet instead of mocknet. Additionally this removes the build tag mappings for the master
and testnet-multichain
branches since they are no longer used.