Add scaffolding for rollkit E2E tests

[chatton]

Summary

Add scaffolding for E2E tests which should do the following

• spin up wasm simapp
• spin up rollkit app
• spin up celestia testnet

We can use the following images

• ghcr.io/chatton/rollkit:latest
• ghcr.io/chatton/ibc-go-wasm-simd:latest
• ghcr.io/rollkit/local-celestia-devnet:v0.12.7

within the test for this initial step.

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[chatton]

Work was done in https://github.com/cosmos/ibc-go/pull/6029 that can be referenced when this is picked up again.