Integration tests for cosmos-sdk App & CosmWasm Rollup

[Bidon15]

Introduction 🧐

As @smuu will be taking charge of https://github.com/celestiaorg/devops/issues/129, this is a breakdown of initial work that we need to do.

Ideas to start with 📝

It will be beneficial if we can check that a running rollup can have the same functionality as the L1 version of it, such as:

### Tasks
- [ ] Simple TXs (send, multi-send)
- [ ] Staking
- [ ] Queries IP:Ports of the node (grpc/rpc/rest/etc.)

Implementation

We can use this https://github.com/celestiaorg/devops/issues/291 when the first iteration of the framework comes out

• [ ] Ideally this epic should cover tests that are executed on every PR
• [ ] Tests should be short-lived
• [ ] using local-devnet docker image makes sense as a base assumption that DA is operable