Create an automated test to find breaking changes

[gjermundgaraba]

We have a good test for chain upgrades, but we should also have an automated test that uses real chain data and see if a new version (PR) will cause app hash errors when one node in a network uses a new version.

Some notes:

• Reuse (maybe pull out into a reusable workflow) the "Export EmpowerChain Genesis" from chain_upgrade-test.yml
• Start up a small network of 3-5 nodes or something
• Upgrade one node
• Run a bunch of simulations (transactions)
• See if the upgraded node is still running

Another option to the simulation/transactions is to let an upgraded node start behind and catch up (rerun old transactions).