Should find and connect all causing changes

[ankon]

It is possible that multiple parameters cause a change in the same resource. These should all be linked, as when reviewing these are very likely also the ones the reviewer looks for.

[ankon]

Problem was caused by a combination of things:

1. We didn't produce unique edge names, as we only used the ChangeSource. We now include the source port and target in the edge name, which should be unique enough.
2. go-graphviz embeds an old version of graphviz, where the logic for looking up an edge by name was broken (https://gitlab.com/graphviz/graphviz/-/issues/1191). We now use a forked version of go-graphviz, until the issue is fixed there (multi-edges generate error on non-strict digraph goccy/go-graphviz#52, Fixed typo that broke wildcard feature in agedgeidcmpf() goccy/go-graphviz#57)