multidim-interop: Prune older versions

[MarcoPolo]

We need to clean up older versions because we're getting close to the GHA limit: #229. Zig-libp2p, for example, already fails to build these tests because we run out of space.

js-libp2p is especially heavy since it includes the browsers. The older go-libp2p versions didn't create minimal images, so those are also heavier than they need to be.

I think it's safe to remove these since:

1. They've been interop tested for a while now, unlikely to find anything new.
2. While it's possible new versions slowly break compatibility with older versions, I feel like it's unlikely without also breaking a less old version (i.e. transitively testing). It's not guaranteed, but I think it's an okay tradeoff.

[MarcoPolo]

Builds are already failing without this, so I'm going to merge this for now to unblock this repo and other repose as well.

[mxinden]

👍