[CI] run same integration tests as node with zombienet

[brenzi]

using the client from encointer-node and the scripts therein

(using the runtime form fellowship/runtimes. already the case...)

https://github.com/encointer/encointer-node/blob/a726f219e0465c1f32037a4955d052e3856c6304/.github/workflows/ci.yml#L188-L334

[brenzi]

@nomelc do you think we could reuse your dockerized benchmarking setup in github actions? Would you be able to implement this in GA?

[nomelc]

After initial review of GA I think one should be able to implement benchmarking with it. However, my current work schedule doesn't allow me to work efficiently on the issue. I suggest to pass on the issue.

[brenzi]

we could get inspired by the instant-sealing mode for testing here:
https://github.com/LibertyDSNP/frequency/blob/79d3bde45271d3d55159630912287e7aea2432af/docker/instant-seal-node.overview.md