[META] IBC

This meta issue lists all the pending changes required for the Gno chain to be compatible with the IBC smart-contracts from https://github.com/allinbits/gno-realms.

- https://github.com/gnolang/gno/pull/4905
- https://github.com/gnolang/gno/pull/4868
- https://github.com/gnolang/gno/pull/4883
- https://github.com/gnolang/gno/pull/4920
- https://github.com/gnolang/gno/pull/4869
