Bank balance migration

[Eric-Warehime]

For chains which have x/bank assets, how can we have an EVM-specific wallet natively mirror balances between contract state which exists in the EVM and that which exists in the bank module.

Research tasks and testing for this.

[Reecepbcups]

https://docs.seitrace.com/evm-less-than-greater-than-wasm-interoperability/pointer-contracts

Demo that takes an ERC20 and uses its bank representation: https://github.com/Reecepbcups/cbb-cbdc-demo

This would be a pretty heavy redesign of Evmos backend iirc vs just using something like Sei approach.