[invariant] improved invariant format
We're using the cosmos invariant pattern which is not super readable when triggered. Initially I thought we'd move towards the x/crisis
module so I wanted to make that transition smooth. But x/crisis
is pretty much deprecated and useless now so we don't need to have that constraint. Not sure the exact format but would like to make an update so these are more readable.
https://thornode.ninerealms.com/thorchain/invariant/asgard
https://gitlab.com/thorchain/thornode/-/blob/develop/x/thorchain/keeper/v1/invariants.go